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Forum: The Forum for Tempera Painting Issues 15-01-18, 08:43 PM
Replies: 1
Views: 165
Posted By Koo Schadler
Below is a glossary that accompanies the...

Below is a glossary that accompanies the handout...


GLOSSARY

Many disciplines study light and color physics, chemistry, psychology, history, and art, to name a few. Each may have differing...
Forum: The Forum for Tempera Painting Issues 15-01-18, 08:42 PM
Replies: 1
Views: 165
Posted By Koo Schadler
Luminosity

Hello Rebecca,

Relative to your last post, in which you asked about luminosity, pasted below is a handout on luminosity. As always I welcome anyone's thoughts, comments, corrections.

Koo
...
Forum: The Forum for Tempera Painting Issues 15-01-18, 07:09 PM
Replies: 8
Views: 1,300
Posted By Koo Schadler
Hi Rebecca, Questions from your last post in...

Hi Rebecca,

Questions from your last post in quotation marks, my reply below them....

“I see now that I have to be patient with learning the technique of this.”

When I demonstrate how, for...
Forum: The Forum for Tempera Painting Issues 15-01-18, 01:09 PM
Replies: 3
Views: 337
Posted By Koo Schadler
When working in either pure egg tempera or an egg...

When working in either pure egg tempera or an egg oil emulsion I layer as soon as the previous layer is dry to the touch, which is generally within 5 to 10 seconds (depending on how watery the layer...
Forum: The Forum for Tempera Painting Issues 01-01-18, 04:13 PM
Replies: 7
Views: 668
Posted By Koo Schadler
Hi Chris, Excuse the tardy reply – you’ve...

Hi Chris,

Excuse the tardy reply – you’ve probably been working away and have already figured out the answers to your questions!

Paints are essentially composed of three ingredients: binder,...
Forum: The Forum for Tempera Painting Issues 01-01-18, 03:17 PM
Replies: 8
Views: 1,300
Posted By Koo Schadler
Hi Rebecca, Pure egg tempera paint and egg...

Hi Rebecca,

Pure egg tempera paint and egg oil emulsions (which have more egg than oil and are water soluble) dry to the touch very quickly (within seconds for thin applications of paint). This...
Forum: The Forum for Tempera Painting Issues 01-01-18, 02:37 PM
Replies: 3
Views: 337
Posted By Koo Schadler
Hi Rebecca Not sure if I understand your...

Hi Rebecca

Not sure if I understand your question, but here are a few thoughts. If your binder/medium is 1 part yolk + slightly less 1 part oil than you are making a water-soluble, egg oil...
Forum: The Forum for Tempera Painting Issues 25-11-17, 07:54 PM
Replies: 17
Views: 14,074
Posted By Koo Schadler
Hi DB, I have worked on oil based grounds,...

Hi DB,

I have worked on oil based grounds, but only when painting in oil. There seems to me a fundamental incompatibility between a ground that contains (even a very small amount) of oil, which...
Forum: The Forum for Tempera Painting Issues 25-11-17, 07:13 PM
Replies: 7
Views: 668
Posted By Koo Schadler
Me again. Well, if that previous post wasn't...

Me again.

Well, if that previous post wasn't enough for you, I have more thoughts regarding your dilemma of trying to arrive at the right color and ending with a “stiff” look. Without seeing the...
Forum: The Forum for Tempera Painting Issues 25-11-17, 07:12 PM
Replies: 7
Views: 668
Posted By Koo Schadler
Hi Chris, I can think of three possibilities...

Hi Chris,

I can think of three possibilities why your gesso surface misbehaved:

1. One factor in traditional gesso’s absorbency is the amount of glue in the recipe. A typical gesso recipe is:...
Forum: The Forum for Tempera Painting Issues 15-11-17, 06:59 PM
Replies: 17
Views: 14,074
Posted By Koo Schadler
Hello All, As discussed in this thread,...

Hello All,

As discussed in this thread, several years ago Sinopia (an art supply company in San Francisco) developed two new grounds advertised as suitable for egg tempera: casein gesso and chalk...
Forum: The Forum for Tempera Painting Issues 17-10-17, 04:00 PM
Replies: 3
Views: 614
Posted By Koo Schadler
Hi Lora, Thanks for the clarification...

Hi Lora,

Thanks for the clarification regarding "grinding" with a muller; i.e. that you've successfully smoothed pigment particles using a roughened slab and muller. You have a lot more experience...
Forum: The Forum for Tempera Painting Issues 13-10-17, 07:17 PM
Replies: 1
Views: 457
Posted By Koo Schadler
Casein Gesso Question

Relative to my other post of the day (Wyeth and Casein Gesso), has anyone had longterm success painting egg tempera on casein gesso? How did the paint behave? I've asked some painters and...
Forum: The Forum for Tempera Painting Issues 13-10-17, 07:12 PM
Replies: 1
Views: 419
Posted By Koo Schadler
Casein Gesso

Hello All,

Artist James Gurney, on his excellent blog, posted excerpts from an 1942 American Artist Magazine article that discussed Andrew Wyeth's working methods (see...
Forum: The Forum for Tempera Painting Issues 13-10-17, 06:58 PM
Replies: 3
Views: 554
Posted By Koo Schadler
Looks fascinating Lora, wish I could go but it's...

Looks fascinating Lora, wish I could go but it's not in my plans. Thanks or bringing it to the Forum's attention, and if anyone manages to attend, please report back!

Koo
Forum: The Forum for Tempera Painting Issues 07-10-17, 01:29 AM
Replies: 3
Views: 614
Posted By Koo Schadler
Hi Lora, It’s an interesting and...

Hi Lora,

It’s an interesting and adventuresome idea. Before discussing granulation in egg tempera, I want to look at some terms that I think can be confusing.

From what I understand...
Forum: The Forum for Tempera Painting Issues 14-08-17, 12:40 PM
Replies: 4
Views: 844
Posted By Koo Schadler
Hi Lora, I've seen this painter's work in...

Hi Lora,

I've seen this painter's work in person, and can't say if the problem occurs exclusively in titanium white because her paintings have so many varied layers, some with white, but some just...
Forum: The Forum for Tempera Painting Issues 10-08-17, 02:10 PM
Replies: 7
Views: 810
Posted By Koo Schadler
Hi All, George sent the following replies......

Hi All,

George sent the following replies...

1. Is the concern of cracking due solely to the high solid content in the Tempera Ground, or also a consideration of the binder?

"The high...
Forum: The Forum for Tempera Painting Issues 08-08-17, 01:16 PM
Replies: 7
Views: 810
Posted By Koo Schadler
Thanks for that info, DB. I think the lack of...

Thanks for that info, DB. I think the lack of flexibility in this ground is due more to its solid content (high PVC), not any brittleness in the binder, but I'm not sure. It would seem if paper is...
Forum: The Forum for Tempera Painting Issues 05-08-17, 09:16 PM
Replies: 7
Views: 810
Posted By Koo Schadler
Another question for George about this ground: is...

Another question for George about this ground: is it correct to presume that at some point it will cure and no longer be water soluble? I am wet sanding the surface of the panels I just made, which...
Forum: The Forum for Tempera Painting Issues 05-08-17, 09:07 PM
Replies: 7
Views: 810
Posted By Koo Schadler
By the way, this ground also works really well...

By the way, this ground also works really well for metalpoint drawing. I've just coated several MDF panels as well as some 300# watercolor paper with it, tinted in various colors. I started with a...
Forum: The Forum for Tempera Painting Issues 04-08-17, 06:48 PM
Replies: 4
Views: 844
Posted By Koo Schadler
Cracking in Egg Tempera Painting

Hello Fellow Tempera Painters,

I have a cohort who's experiencing cracking in the uppermost layers of her paintings. It starts out as very faint, fine lines that gradually increase with successive...
Forum: The Forum for Tempera Painting Issues 04-08-17, 06:06 PM
Replies: 7
Views: 1,176
Posted By Koo Schadler
Oh lordy Salamander you are very sweet and I am...

Oh lordy Salamander you are very sweet and I am totally impressed by your organizational abilities but I am definitely embarrassed too... so please, very dear readers, no more about the book! In fact...
Forum: The Forum for Tempera Painting Issues 03-08-17, 06:28 PM
Replies: 13
Views: 1,249
Posted By Koo Schadler
Got it, George - thanks for all of those...

Got it, George - thanks for all of those clarifications. Very helpful to have a scientist chime in.

Koo
Forum: The Forum for Tempera Painting Issues 03-08-17, 05:31 PM
Replies: 13
Views: 1,249
Posted By Koo Schadler
It's probably unwise to disagree with a genuine...

It's probably unwise to disagree with a genuine paint chemist (George) when I didn't even finish high school chemistry, but I'll give it a try. George has explained dispersive adhesion to me before...
Showing results 1 to 25 of 309

 
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