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Raffless
12-28-2018, 07:05 PM
Just saw this video and its quite a fascinating watch if your interested. But at 9 minutes 10 seconds or so in the Conservator says he uses 'archival and reversible pigments'. But i have never heard or seen anyone use a reversible pigment. What are they and why does the conservator use them? Googling just shows a sun sensitive pigment that reacts to sunlight. But thats not what you want in a conservation. He does says later the benefit is you can remove them easier for reworking. But you can do that with normal pigments i think.

https://m.youtube.com/watch?v=v1Mjc4zNfY4

Edit. Or is he just saying 'irreversible pigments aren't used? Again if so what are these? Not Phthalo dyestuff obviously.

french.painter
12-28-2018, 07:25 PM
Archival, because if the pigments change color after a few years under the light, all these retouchings will become visible and disturbing. Hence the choice of archival lightfast pigments.
Réversible, because all retouchings, mastics, glues, varnishes, put on an original painting can be removed at any time after. Strictly speaking, the pigment is not reversible, it is the retouching paint as a whole which must be reversible. To prepare such paints, pigments are not dispersed in oil but in resins which remains easily soluble by future restorers.

Raffless
12-28-2018, 07:58 PM
Oh i see thanks. So the pigment is dispersed in an easy soluble resin not in an oil. Interesting. Its was quite ambiguous. Still a fascinating short video.

sidbledsoe
12-28-2018, 11:26 PM
Conservators use reversible aldehyde resin paints for retouching, Gamblin makes some (https://gamblincolors.com/conservation-colors/conservation-colors-21st-century/) of them.

liltingzephyr
12-29-2018, 01:40 AM
I watched the same video earlier today and googled to find out what kinds of paints were removable. Conservation is intriguing and something I’m excited to learn more about.

Raffless
12-29-2018, 03:58 AM
Conservators use reversible aldehyde resin paints for retouching, Gamblin makes some (https://gamblincolors.com/conservation-colors/conservation-colors-21st-century/) of them.

Thanks Sid.

Raffless
12-29-2018, 04:01 AM
I watched the same video earlier today and googled to find out what kinds of paints were removable. Conservation is intriguing and something I’m excited to learn more about.

It is interesting. I guess with over 1 Million views a lot of other folk think so too :)

asdo
12-30-2018, 01:33 AM
"Baumgartner Restoration" has some amazing videos on youtube of restorations. Just throwing that out there...:)

Raffless
12-30-2018, 03:45 AM
"Baumgartner Restoration" has some amazing videos on youtube of restorations. Just throwing that out there...:)

They are the the video link i gave in the starting thread. :)