Using a refillable marker helps to alleviate issues with characters become faint over time. AusPen has, in my opinion, the best system as far as how the marker performs over the long term, and the Pilot V Board Master is a close 2nd. The only reason that the Pilot takes 2nd place is that the nibs aren't replaceable like they are in the AusPen.
Even simple things continue to be used. I love how much love and craftsmanship goes into such a simple product. Your factories are also clean and a shining example of Japanese pride in your work.🙏👍
Povo disciplinado! Fico orgulhoso do povo Japonês, como queria que no Brasil, as pessoas possuíssem a metade da disciplina e respeito que essa nação têm. Saudações do Brasil 🇧🇷
That is a good quality school chalkboard 👍 I like the details on it look nice. Do those signs go on the wall or above a door is it for middle/ high school 😀✌️❤️
my school days i remember the boards or chalk caused Gosh awful ear piercing squeak or if the dry erase boards were used the markers gave you a head ache. Plus they smelled.
Did you know that we are in the Middle East, specifically Iraq, we consider Japan and the people of Japan to be the most accurate and quality, and the people are the safest and most diligent people. Greetings to you, and we hope that you will maintain this character and good reputation. Because of the quality of workmanship
The old technology of such boards and write on them with chalk. Nowadays modern boards are made of plastic and are written on them with markers. Although, as I noticed, with prolonged use such a board begins to show the marker and it becomes not so presentable, which cannot be said about the classic chalkboard. I always wondered what is that green chalkboard that is not on the board at 2:44 in the video it is glued to the wooden case
With the white boards, you have to maintain it with the proper cleaner. Quite often, the maintenance workers of a school/university will use excessively harsh chemicals that wear down the coating. The type of board also matters. Tempered glass boards will never leave marks. Porcelain and even more so melamine boards can be prone to streaking and ghosting when the marker is left on for prolonged periods.
@@paulterhaar4218 I agree with you that plastic boards are also not a novelty, but for school institutions they could also be supplied Of course, interactive whiteboards are a step forward, but I think it would be financially difficult for schools to buy them in classrooms.
@@queueeeee9000 I noticed that if you leave the marker for a few days it is problematic to remove it and after you remove the inscription still appears, it is possible that this is a marker with a very resistant paint, glass chalkboards are also good in its own way but they are not installed in schools because of safety, as you can break and damage the students
Хороший пример, как небольшое дело можно организовать мотивируя коллектив. Замена доски показалась немного странной, но видимо этому есть причина - например, стены здания. Доска выглядит современно, и в тоже время ящички для мела придают немного архаики. 👍во славу труда
I still get the giggles when they call a greenboard a blackboard, even after 50 years, what I did like is how they all started their day as a group wish more companies had this kind of start to the day it gives one pride in their work and helps you to communicate with others in the work place.
I used to make a blackboard or green board back in high in the late 60s for our class project. It is made of heavy cardboard and wooden frame, paint it a small can of green flat paint. Our teacher was so happy to get a new portable board! THS70!
Это замечательно, что в Японии сохраняют традиции! Очень хорошо, когда старое, проверенное временем и новое стоят рядом. Традиционная школьная доска должна оставаться в школе как можно дольше! Максимум, на что можно её заменить - это белая доска с маркерами, которые можно стирать.
ага и вместо реальной замены полотна тупо наклеили поверх другое, и даже не размазали клей, а прихватили на шматки, при этом сократили рабочее пространство... традиции такие традиции... а какое новое высокоточное оборудование применяется - старый горб дедушки Атсуши...
Today here in Brazil, especially here where I live in Brasília DF, the paintings are all white acrylic, to be used with thick felt-tip pens that we call atomic brushes. Seeing these paintings being produced gave me a warm and nostalgic feeling, it reminded me of my childhood and youth. Very good!
Same here in NZ, they got rid of all the blackboards for some reason and replaced them with those stupid whiteboards, which most people hate. Hard to see how chalk dust is more hazardous than the sniffing of the volatiles in the markers by shitty kids everywhere lol. But we love a good blackboard and have made our own for personal use 👍
Yeah I was plenty disappointed that these aren't slate boards. I've been a math lecturer for 25 years and always cringe when I'm stuck with one of the boards made like this
I'm pretty sure they're called "blackboards" because of the predominate color of the material. Otherwise, they would be called "slate-boards," or just "slates."
in most Australian schools they've been superseded by electronic smart boards. I was one who was grateful to give away the old chalk and all it's dust.
Don't get me wrong, I'm 100% all about preserving Old World Craftsmanship & believing we need to train younger generations in the ways of keeping trades alive; blackboards are a thing of the past in schools, & they need to update to Whiteboards (or other electronic visual aids) The reason is quite simple: Health of students & teachers. I come from a background in construction and plant mechanics. Quite often in the past we had to change the way certain things were done, often for health related reasons. Blackboards create a LOT of dust. When I was attending High School back in the 1980's, my school had already started to change over to whiteboards even back then. When we asked the staff why, they simply responded that it was due to the effects of dust. Blackboards & chalk do have their place in the world, along with the trades people that preserve their heritage. I just don't thinks schools are that place anymore.
@@ChristLink-Channel Again, I don't know where you're from, but here where I am there are chemical free whiteboard markers that use alcohol, water & other non harmful elements. You want to eat & breathe dust, for the sake of some romanticised classroom "Old School" notions, I wont be stopping you. Bye!
I've never been in a school situation where the blackboards were made of genuine slate. Only seen it in movies. I think the labor and weight of the slate would make it expensive for large institutions (unless the school/institution was wealthy, or close to a slate source).
@@kenc2257 Not really, slate is always installed in smaller segments that are joined together. It's pretty much the only disadvantage of it - that you can see the vertical lines where the slates start and end.
Using drill motors instead of impact screw drivers to drive screws. It might be done this way because drill motors have less driving force and reduce stripping the screw threads. That is my guess.
Should be outlawed. Ever since the days of Windows 3.1, there where plenty of digital boards in which students and teachers could use the stylus to do things with each other. These things just don't cut it anymore, if you want to learn nice and well, use the digital boards with the stylus. NEC is a Japanese company itself and should had swept all of the Japanese schools with digital boards, but they did not want to.
I've been driving Japanese cars for 35 years! Beautiful cars, and then it turns out that they make such high-quality and beautiful school boards! Bravo! Greetings from Vladivostok!
In Australia, you are not allowed to use blackboards in schools, due to the dangers of chalk dust inhalation, mainly by teachers. I was a teacher, but we used whiteboards with toxic solvents in marker pens instead, which were thrown away after they ran dry. I'd rather use chalk on a damp board, and vacuum up any dust. Less waste generated.
What's the problem with not using "toxic" solvents? There are markers based on alcohol, water, and other safe substances. In any case, the amount of solvent in one marker, which will last for several weeks or months, is not capable of in any way harming a person, even if it is drunk, while chalk dust is extremely bad for the lungs and eyes of teachers. Solvent vapors can be easily removed by ventilation, while dust is heavier and can settle on clothing, skin, and the surrounding area. And finally, whiteboards are easy to upgrade to interactive whiteboards - just install a cheap projector and ultrasonic pen sensors. Still, we live in the 21st century, and it is worth at least where there is money to switch to more modern technologies.
一時期教壇に立ってました。ホワイトボードの教室もあったんですが、個人的には黒板の方が書きやすく、授業がしやすかったです。ホワイトボードだとマーカーのインク切れがわかりにくく、字が薄くなってしまうこともしばしばですが、黒板にチョークならその心配もない。黒地に白というのは視認性も抜群で読みやすい。日本の黒板は艶消しにしてあり、そのザラザラが書きやすさと読みやすさの大きなポイントだろうと思います。チョークの粉で手が汚れるのが唯一の難点で、授業中にしょっちゅうピアノを弾く音楽科教員としてはそこはちょっと困りましたが、授業のしやすさは断然黒板です。これからも作り続けてほしいと思います。
Using a refillable marker helps to alleviate issues with characters become faint over time. AusPen has, in my opinion, the best system as far as how the marker performs over the long term, and the Pilot V Board Master is a close 2nd. The only reason that the Pilot takes 2nd place is that the nibs aren't replaceable like they are in the AusPen.
問題是使用粉筆不會有灰塵的問題嗎？
@@SammyNineFingers 確かに補充可能なマーカーは便利なのですが、ホワイトボードは滑りが良すぎて私はちょっと書きにくいのです。適度な摩擦抵抗があった方が私は書きやすく、その点で黒板とチョークの組み合わせがベストだと思っているのです。これはあくまで私個人の考えです。もちろんホワイトボードとマーカーの方がいいという方もいらっしゃるでしょう。
@@하충불가이어어빙 普通に書いたり消したりしている限りでは粉塵が問題になることはありませんでした。日本でも昔はチョークの粉塵で肺にダメージを負ってしまった教師が大勢いたそうですが、ここ40〜50年の間に体への害が減り、粉塵が舞いづらいようにチョークが改良され、健康を害する人はほとんどいなくなりました。手指や服の袖口は粉で汚れやすいですが、それは拭いたり洗ったりすれば綺麗に落ちました。
@@하충불가이어어빙 不會，書寫和擦黑板不會掦灰，拍打板刷才會
私の家族も台湾で黒板を作っていますが、他の国の黒板工場を見てとても嬉しく思います。
黑板通常是多久換一次?
@@user-shifumi
黑板板面愈粗糙寫愈久
白板就是倒過來，愈光滑用愈久
我們家做的通常使用及保養得當且經常寫可以用10~20年沒問題（我們有客人用超過30年才壞的）
工事で黒板使用してます。
最近は黒板も電子入力が増えてきましたが、自分は黒板で写真を撮るのがすごく好きです。
お客さんからも黒板の字がきれいですねって言っていただけたりしますし、黒板は欠かせません。
これからも作り続けてください。応援しています。
いつもお世話になっております。黒板がなんでかあたたかい感じがするのは、木のぬくもりと職人さんが手作業で手作りしているからなのかもしれませんね。
明後日からは新学期始まって初回の授業なんですが、「黒板ってさ・・・」なんて話を少ししてみたいと思います。
Proud and happy workers, makes quality work no matter how simple the product is.
Even simple things continue to be used. I love how much love and craftsmanship goes into such a simple product. Your factories are also clean and a shining example of Japanese pride in your work.🙏👍
0:00 I CAN FEEL IT COMING IN THE AIR TONIGHT!!! OHH LORD!!!!!
ホワイトボードだと、ペンが滑るので雑に書いてしまいがちだけど、
黒板だと、程よい摩擦感とチョークとの音が集中力を高めてくれる!
Great video
13:08 this guy got the best job
プロセスX👍👍👍
Povo disciplinado! Fico orgulhoso do povo Japonês, como queria que no Brasil, as pessoas possuíssem a metade da disciplina e respeito que essa nação têm.
Saudações do Brasil 🇧🇷
黒板の連盟なんてあるんだ！！初めて知りました。
I'm that old I remember when blackboards were actually black.
a great people
thank you.
The Japanese are from another planet
すべての文明人に感謝します神に感謝します私はこの美しさと洗練を見たことを非常に誇りに思っています。
参加できてとても光栄です。
エジプト人
오~ 칠판 만드는 영상은 완전 처음봤어요 ㅎㅎ 재밌게 잘보았습니다.
Very cool
小6の夏休み中に黒板だけ、中1では校舎耐震工事のために真新しい黒板で授業受けられたことがあった。新しい黒板は結構みやすい
That is a good quality school chalkboard 👍 I like the details on it look nice. Do those signs go on the wall or above a door is it for middle/ high school 😀✌️❤️
مبدعون تحية من العراق 😊
Japanese quality and perfection keeps on amazing me.
Outstanding the calm and serenity of the Japanese craftsmen.
It's definitely a pleasure to work in a company like this 🙏
my school days i remember the boards or chalk caused Gosh awful ear piercing squeak or if the dry erase boards were used the markers gave you a head ache. Plus they smelled.
Sujet très intéressant, merci pour la vidéo!
Buen trabajo 👍
黒板といえば、板の上に濃緑色の黒板塗料を塗って作るものの他に、木枠の上に黒板シートを貼って、それからフレームやチョーク入れなど部品をつけて仕上げるものもあるんだね。私達が学生時代にお世話になった黒板。これからも札幌教材さんには黒板を作り続けてほしいと思う。
ああ、日本人よ、あなたは生きるに値する
❤❤❤
Seeing things like Chorei (morning meeting) make me happy to be Japanese in Japan.
Did you know that we are in the Middle East, specifically Iraq, we consider Japan and the people of Japan to be the most accurate and quality, and the people are the safest and most diligent people. Greetings to you, and we hope that you will maintain this character and good reputation. Because of the quality of workmanship
칠판이 어떻게 만들어지는지 처음 봤네요. 대단합니다
영상 시청해주셔서 감사합니다.
Que buen trabajo y equipo felicidades.
In my school blackboards were made of slate
Of all the things I saw in this vid, it's the neat little ratchet c clamp the fella uses to temporarily locate the top!
Search for „Bessey lever clamp“
The old technology of such boards and write on them with chalk.
Nowadays modern boards are made of plastic and are written on them with markers. Although, as I noticed, with prolonged use such a board begins to show the marker and it becomes not so presentable, which cannot be said about the classic chalkboard.
I always wondered what is that green chalkboard that is not on the board at 2:44 in the video it is glued to the wooden case
Plastic boards with markers nowadays? 🤣 You mean interactive boards. Or are you from Kenya or Pakistan? 🤣🤣🤣
With the white boards, you have to maintain it with the proper cleaner. Quite often, the maintenance workers of a school/university will use excessively harsh chemicals that wear down the coating. The type of board also matters. Tempered glass boards will never leave marks. Porcelain and even more so melamine boards can be prone to streaking and ghosting when the marker is left on for prolonged periods.
@@paulterhaar4218 I agree with you that plastic boards are also not a novelty, but for school institutions they could also be supplied
Of course, interactive whiteboards are a step forward, but I think it would be financially difficult for schools to buy them in classrooms.
@@queueeeee9000 I noticed that if you leave the marker for a few days it is problematic to remove it and after you remove the inscription still appears, it is possible that this is a marker with a very resistant paint, glass chalkboards are also good in its own way but they are not installed in schools because of safety, as you can break and damage the students
@@paulterhaar4218 - What’s wrong with Kenya or Pakistan? Hmmm….🤔
in one word everything at school
아버지가 소규모 칠판 업체르 운영하시는데 뭔가 비슷하면서도 다른 부분이 보여서 재밌네요
일본사람들이 꼼꼼하게 잘만드네요
한국사람은??
@@하충불가이어어빙 한국사람들은 뭔가 다양하게 만드는거같아요!
@@하충불가이어어빙 대충대충 요행을 바라고 돈만 벌려고 만들지
Nice, but I'll still take my old school slate boards.
هذا الفيديو المميز من أسباب تقدم ونجاح اليابان 💯/💯
Хороший пример, как небольшое дело можно организовать мотивируя коллектив. Замена доски показалась немного странной, но видимо этому есть причина - например, стены здания. Доска выглядит современно, и в тоже время ящички для мела придают немного архаики. 👍во славу труда
in the end it works
影片跟鄉下才看得到的東西 我念過的學校從沒用過
10 years after stacking new to old, it becomes 1 feet thick
미래는 개인용 노트북으로 디지털
교과서 나올듯 한대 지금의 방식이
언제까지 갈지 몰라도 손이 많이
가는군요.
I still get the giggles when they call a greenboard a blackboard, even after 50 years, what I did like is how they all started their day as a group wish more companies had this kind of start to the day it gives one pride in their work and helps you to communicate with others in the work place.
I used to make a blackboard or green board back in high in the late 60s for our class project. It is made of heavy cardboard and wooden frame, paint it a small can of green flat paint. Our teacher was so happy to get a new portable board! THS70!
黒板の張り替えって上から貼り付けるなんて想像出来んかったｗｗ
凄い憶測なんですけど、昔は本当に硬い板みたいな気がしたんですけどね、本当はあんなゴム状の黒板を木の板に貼り付けてたんですかね？
昔の黒板は色が黒で緑では無かったですがこの頃の黒板は漆で塗装した様です。
下地処理を含め大変な手間だったと思います。
現在は0.4mmのスチールにホウロウ焼き付けして削った物、研磨剤入の塗装を行った物が有るそうです。
動画の物はゴムでは無くゴム系両面テープを裏打ちした物ではないでしょうか。
Me sorprende mucho el discurso del principio y la mision social que buscan cumplir.
Japanese are cool
They don't show how the actual green part of the "blackboard" is made? That is the most important piece!
Qualitative & beautiful in God's own country, Japan ~
韓国人である私が見た時、日本は教育に関連するものをよく作るようだ。
例えばボールペン、鉛筆、消しゴムなどである。
👋 👍 🙃 !
危険予知活動ボードは会社にあります。インクジェット印刷とは思いませんでした。
Это замечательно, что в Японии сохраняют традиции! Очень хорошо, когда старое, проверенное временем и новое стоят рядом. Традиционная школьная доска должна оставаться в школе как можно дольше! Максимум, на что можно её заменить - это белая доска с маркерами, которые можно стирать.
ага и вместо реальной замены полотна тупо наклеили поверх другое, и даже не размазали клей, а прихватили на шматки, при этом сократили рабочее пространство... традиции такие традиции... а какое новое высокоточное оборудование применяется - старый горб дедушки Атсуши...
@@Ftroll Ты в своей жизни ничего полезного для людей не сделал(а), так что засунь свои руки, которые растут из жопы, себе в рот и поди прочь отсюда!
👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
黒板好きだけど
やっぱり価格と利便性がホワイトボードの方が高いから、だんだんとホワイトボードに変わっていくんやろなぁ
😭
時間が溶けていく
Người Nhật làm việc theo quy tắc đề ra. Chất lượng cao phải đặt lên hàng đầu 🇯🇵👍.
Today here in Brazil, especially here where I live in Brasília DF, the paintings are all white acrylic, to be used with thick felt-tip pens that we call atomic brushes. Seeing these paintings being produced gave me a warm and nostalgic feeling, it reminded me of my childhood and youth. Very good!
Same here in NZ, they got rid of all the blackboards for some reason and replaced them with those stupid whiteboards, which most people hate. Hard to see how chalk dust is more hazardous than the sniffing of the volatiles in the markers by shitty kids everywhere lol. But we love a good blackboard and have made our own for personal use 👍
Greenboard still widely used in Indian education institutions, tho digital boards are fast taking up their place
umm, tradition is Slate they are made of black slate stone, that's why we call them blackboards.
Kids today Ill tell ya
Yeah I was plenty disappointed that these aren't slate boards. I've been a math lecturer for 25 years and always cringe when I'm stuck with one of the boards made like this
I'm pretty sure they're called "blackboards" because of the predominate color of the material. Otherwise, they would be called "slate-boards," or just "slates."
Was expecting to see some elaborate Japanese wood joinery, but got staples instead.
Magnifique
Алюминиевый профиль, пластик и с какого века эта традиция?
тсс... не пали контору :)
モルドバからのご挨拶、私は日本と日本のテクノロジーとエレクトロニクスが大好きです。英語も日本語もわかりません。私は本業が大工で、御社で働きたいと思っています。
原來黑板是貼上去的❤
Из простого дела, сделали целую науку =)
Người Nhật thà lời ít nhưng không để mất uy tín thương hiệu của mình. Rất OK 🇯🇵👍.
一個黑板吹上天😂
Все хорошо, но "утренняя процедура" явно не по мне. ))
Что за колхоз поверх старой доски клеить новую?! Ппц...
今は塗料で塗って水研ぎしては、効率悪いし少ないんだろうな…
2:59 請問，這種卡榫式的C型夾在日本是什麼名稱 ?
クランプと呼んでます。
مشاء الله
Лучшая доска что я видел это матированное стекло, темным фоном с тыльной стороны. Надписи мелом контрастны, без бликов. Видно из далека.
Makita 💪
그동안 수 많은 노하우가 쌓여..이렇게..
in most Australian schools they've been superseded by electronic smart boards. I was one who was grateful to give away the old chalk and all it's dust.
うちの会社の製品映ってるやん
不意打ちびっくりするわ
😊
Вік живи, вік учись!
Don't get me wrong, I'm 100% all about preserving Old World Craftsmanship & believing we need to train younger generations in the ways of keeping trades alive; blackboards are a thing of the past in schools, & they need to update to Whiteboards (or other electronic visual aids) The reason is quite simple: Health of students & teachers. I come from a background in construction and plant mechanics. Quite often in the past we had to change the way certain things were done, often for health related reasons. Blackboards create a LOT of dust. When I was attending High School back in the 1980's, my school had already started to change over to whiteboards even back then. When we asked the staff why, they simply responded that it was due to the effects of dust. Blackboards & chalk do have their place in the world, along with the trades people that preserve their heritage. I just don't thinks schools are that place anymore.
So you are saying that the chemicals used on whiteboard pen inks are safer than the natural chalk dust?
@@ChristLink-Channel Again, I don't know where you're from, but here where I am there are chemical free whiteboard markers that use alcohol, water & other non harmful elements. You want to eat & breathe dust, for the sake of some romanticised classroom "Old School" notions, I wont be stopping you. Bye!
Once you spend a few hours teaching while using a real slate black board you will throw stones at these vinyl fakes.
The real stuff bites into the chalk much better
I've never been in a school situation where the blackboards were made of genuine slate. Only seen it in movies. I think the labor and weight of the slate would make it expensive for large institutions (unless the school/institution was wealthy, or close to a slate source).
@@kenc2257 Not really, slate is always installed in smaller segments that are joined together. It's pretty much the only disadvantage of it - that you can see the vertical lines where the slates start and end.
0:50
a machine could not do this faster than a single japaneese man after a bowl of rice
Using drill motors instead of impact screw drivers to drive screws. It might be done this way because drill motors have less driving force and reduce stripping the screw threads. That is my guess.
Should be outlawed. Ever since the days of Windows 3.1, there where plenty of digital boards in which students and teachers could use the stylus to do things with each other. These things just don't cut it anymore, if you want to learn nice and well, use the digital boards with the stylus. NEC is a Japanese company itself and should had swept all of the Japanese schools with digital boards, but they did not want to.
@Ithecastic Absolutely agree! Sometimes "old-school" is simply better.
I've been driving Japanese cars for 35 years! Beautiful cars, and then it turns out that they make such high-quality and beautiful school boards! Bravo! Greetings from Vladivostok!
I've been twice to Japan. 6 & 8 weeks, all over the country. Best trips ever.
I've read that 450 schools are closed per year in Japan.
That's not good for this business.
黒板が古くなると表面のコーティングが剥げて文字が消えにくくなるんだよね笑黒板消しが潰れるぐらい体重かけて消してたわ汗
なんか消しにくい黒板あるのってコーティングの影響だったのか！初耳
I do not know why but I thougt it was a thick green block and not a tiny layer
最近の文部科学省や教育委員会事務局といった教育行政は、内閣府や経済産業省ら素人の介入に乗って「黒板とチョークの授業は古い」とけなしてくるのだが、パワーポイントと異なり黒板には様々な利点が存在する。
①黒板1枚でその時間の授業がまとまっており、振り替えることができる。
②濃緑色に白(もしくは明るいチョーク)の文字は当然ブルーライトによる悪影響はないにも関わらず文字がくっきり識別できる。
③色覚特性対応のチョーク(日本製羽衣がなくなったのは残念)がある。
④チョークの使い方により太い細いも合わせた、止め跳ねはらい等の文字表現が可能。
等。ホワイトボードと比較しても「変な反射しない。」「プロジェクターで投影可能」などの利点があったりする。
「古臭いものをまだ使っている」のではなく、「適しているものを使っている」のだと、現場に来ない行政屋にはわからない。
ホワイトボードはよく光の反射で見えない時あるから広まったら困る
@@まるっと-r7u そう！それ！
書く側からしても、変に滑って書きづらいし、太い線が引きずらいんよ！
あと、チョークでできる点線の引き方ができない！(摩擦を利用して一気にﾀﾞｶﾀﾞｶﾀﾞｶﾀﾞｶｯ!てやつ。)
@@まるっと-r7uそりゃ黒板は教室の証明の位置や太陽光まで全部配慮して作られてるし
Marrant de voir un pays dit ultra-moderne, et faire encor tout à la main.
今後黒板はプロジェクターか電子黒板に置き代わって無くなっていくんでしょうね…。
Nowadays, people are using computer screens and not blackboards.
no wonder they are going dumber
In Australia, you are not allowed to use blackboards in schools, due to the dangers of chalk dust inhalation, mainly by teachers. I was a teacher, but we used whiteboards with toxic solvents in marker pens instead, which were thrown away after they ran dry. I'd rather use chalk on a damp board, and vacuum up any dust. Less waste generated.
What's the problem with not using "toxic" solvents? There are markers based on alcohol, water, and other safe substances. In any case, the amount of solvent in one marker, which will last for several weeks or months, is not capable of in any way harming a person, even if it is drunk, while chalk dust is extremely bad for the lungs and eyes of teachers. Solvent vapors can be easily removed by ventilation, while dust is heavier and can settle on clothing, skin, and the surrounding area.
And finally, whiteboards are easy to upgrade to interactive whiteboards - just install a cheap projector and ultrasonic pen sensors. Still, we live in the 21st century, and it is worth at least where there is money to switch to more modern technologies.