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Originally Posted by Jeremiah White
I want to experiment with different supports but I want to be sure that I'm sealing it correctly. I do have some questions that I figured that you all could answer. I tried looking up the answers in previous threads but the questions were a bit different then what I had in mind.
I've heard conflicting ideas so I wanted your opinions. Which is better for sizing a canvas, hardboard, or thick paper; PVA sizing or Rabbit skin glue?
I think that I have an idea of how to use the RSG from other threads but I was wondering about the PVA sizing. How much do you dilute the PVA sizing? I've read everything from 1 part PVA sizing and 1 part water to 1 part PVA sizing to 10 parts water.
How long do you usually let the sizing (both PVA and RSG) dry before applying gesso?
Thank you in advance.
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Here's some differences between RSG and PVA:
RSG shrinks much more in its transformation from a liquid to a solid than does PVA;
RSG when fully cured has a higher adhesive strength than does PVA;
RSG at proper temperatures, due to its lower surface tension will have better absorbtion than PVA;
RSG is more expensive and more difficult to handle than is PVA.
That's just a few things. Your choice should be dictated by specific application. I reccomend RSG for sizing canvas and hardboard. For paper I use geletin as it doesn't shrink nearly as much.
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