Extinct pigment to handmade paint, Thioindigoid Violet PR88
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- Опубліковано 27 вер 2024
- This is the beautiful PR88, Thioindigoid Violet. A pigment that’s discontinued and thus in my collection of extinct pigments.
Thioindigoid is Acetic acid heated with concentrated Sulfuric acid and it’s a lake pigment. It existed ranging from deep reds to vibrant violets with quite a large drying shift (as you can see at the end of the video).
Since it’s a lake pigment, the lightfastness rating never exceeded that from ‘’good’’. Meaning it’s a paint that shouldn’t be used for archival ends. Thioindigoid PR88 has been replaced 1:1 with PV19, Quinacridone Violet (or red, depending on the hue you’re after). Feeling quite similar when making paint and are very, very similar in behavior. Only the latter is lightfast.
As handprint.com states: ‘’PR88 mixes to some very attractive dusky violets with ultramarine, cobalt or prussian blue, as well as lovely browns with orange and yellow paints.’’
Maybe one that’s too exclusive to mix now, but it’s sure suited for it!
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Perhaps it’s just me, but even if the pigment isn’t as lightfast, I will always go for a rarer pigment, it just romanticizes the process for me, as if I’m “documenting” the rare color. Naturally this here is a much better documenting of the pigment than I could ever do!
I’m behind this thought 100%! 😅 also, I do sell these dots if you send me a message 😉
Absolutely stunning. I see the resemblance to quin violet especially. It looks like it would have some unique mixing properties, at least to my eyes.
I think it does! And it does look quite like Quin violet indeed!
It’s sad to see a pigment become extinct. Surely you don’t sell these ones? So precious!
I might have some dots laying around if you’re interested to buy this pigment as a paint
@@dirtyblueshop yeah, I got some of your Quinn Gold and 3 other colors for a limited palette. I knew some pigment must exist in the world.
@R5YUSER oow that’s nice! The violet or red version?
Thank you Laurens, an interesting colour in it's own right, PV19 has become so ubiquitous for a reason but this is lovely.
On a side note the 'indanthrene violet I was curious about the other day (PV36) is also described as 'thioindigoid' so perhaps related?
Maybe! I’ll look into it!
I didn’t know there was an Indanthrene violet! I use the blue often but now I’m so curious to find this violet
to fill out the synthesis description a little, it's 2-(2,5-Dichlorophenylthio)acetic acid and chlorosulfonic acid in hot anhydrous concentrated sulfuric acid. Someone dropped the full description in one of the databases and the truncated description got propagated from there. Sorry to rain on the parade of anyone hoping vinegar and sulfuric acid would work.
Thanks for the addition!
I do find it still available in American Journey Passionate Purple and in several of the DaVinci watercolors
this one is pretty.
but yeah if it's not super lightfast it's a bit of a problems unless you make prints.
Sush a beautiful color ohmy!!
Thank you!!! It really is 😁
First!
💪
Lovely video and such an interesting colour.
☺️🙏
I have a pan of PR88 in my palette and absolutely love it. The version I have is quite red so I use it frequently in mixes.
Lucky you!!
@@dirtyblueshop I was super extra at one point last year and mixes it with YInMn and PY159 in a Short
@alexandrasartinsanity 😅😅🤙
I have some from Grumbacher and Winsor and Newton. It's so interesting to paint with and i like the slight earthiness and smoother texture compared to PV19
Thanks for the addition, earthiness is a good way to describe it. Is it the drying shift or overall in those paints?
@dirtyblueshop I would say the drying shift. And the 3 I have are all basically the same exact hue, Grumbacher Academy and Finest, and Winsor+Newton Pro
This is one sexy video.
😏😅