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Forum: The Forum for Tempera Painting Issues 11-04-10, 01:57 PM
Replies: 26
Views: 24,484
Posted By dbclemons
The most common method of making a clear shellac...

The most common method of making a clear shellac is to bleach it with alkali to the desired transparency. Another process is to just diluted it more with solvent. Bleaching makes the shellac less...
Forum: The Forum for Tempera Painting Issues 08-04-10, 01:26 PM
Replies: 26
Views: 24,484
Posted By dbclemons
I've personally not tried polyurethane under...

I've personally not tried polyurethane under gesso, but have for oils. It should be sanded, and I'd use water based instead of oil based polyurethane. Gesso will adhere fine to shellac, which would...
Forum: The Forum for Tempera Painting Issues 06-04-10, 04:14 PM
Replies: 26
Views: 24,484
Posted By dbclemons
Wood made with phenol resin doesn't necessarily...

Wood made with phenol resin doesn't necessarily have to contain formaldehyde, or the amount is considered extremely low. Panels that contain urea formaldehyde resin (UF) are more of a concern, most...
Forum: The Forum for Tempera Painting Issues 02-04-10, 07:19 PM
Replies: 26
Views: 24,484
Posted By dbclemons
Mounting fabric to the wood panel is an ancient...

Mounting fabric to the wood panel is an ancient practice and makes sense for precautionary measures. It's my own belief that if the wood is of a high quality showing little movement and a species...
Forum: The Forum for Tempera Painting Issues 30-03-10, 01:31 PM
Replies: 26
Views: 24,484
Posted By dbclemons
There are various mills that make both and they...

There are various mills that make both and they follow no real standard. The big deal with them is that they are designed mainly for construction purposes, not art use. They don't say what's in them...
Forum: The Forum for Tempera Painting Issues 29-03-10, 02:39 PM
Replies: 26
Views: 24,484
Posted By dbclemons
Thanks, Doug. That further emphasizes my point on...

Thanks, Doug. That further emphasizes my point on how important it is to select the right type of wood. For example, if you buy a birch panel, what kind of birch is it, paper, yellow, river,...
Forum: The Forum for Tempera Painting Issues 28-03-10, 02:47 PM
Replies: 26
Views: 24,484
Posted By dbclemons
Although all wood has movement, they don't all...

Although all wood has movement, they don't all move to the same degree, so I might question the type you have seen. I applaud your concern with quality, but don't judge all wood by the poorest...
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