I will respond within your post for convenience. My responses will be in
Thank you very much for the information. I did try an acrylic dispersion
ground from liquitex, but for some reason it did not adhere that well to the
canvas, the epoxy could be pulled off a bit too easily. Could the reason
be that it was applied directly to the fabric prior to sizing it with an
acrylic medium? or not the right thickness and amount of layers applied?
This does not make sense to me. The acrylic dispersion ground should have
adhered perfectly well to the canvas without a size. The size would just
prevent the ground from soaking into the canvas. What kind of canvas are you
using? Is this one specifically for artists or could it have some sort of
commercial coating that is impeding adhesion?
For sizing you mention that it would be a sufficient hold out , do you mean
I simply meant enough of a size layer to prevent the epoxy from actually
soaking into the fibers of the canvas.
Regarding the sizing , is an acrylic polymer (acrylic dispersion medium
designed as size) more durable (archival) than a PVA size ? If yes could you
please recommend the most durable ones in the market ?
I am not specifically saying that acrylic dispersions are more "archival". My understanding
is that they are capable of creating a more rigid surface which may be of use
to you are you are applying a brittle epoxy layer to a flexible support and any
added rigidity would help to offset this to some degree.
You recommended following directions for sizing fabric intended for an oil
ground, is there a particular reason for this ?
I only meant that if you applied it in a similar manner as one used for an
oil ground, the layer would be sufficient to prevent the epoxy from soaking
into the canvas fibers.
Do you think that Size → Ground→ Epoxy is a permanent and best solution
instead of Ground→Epoxy or Size→Epoxy ?
I think that either a canvas with a size and a ground or even a substantial
acrylic dispersion ground without a size would be preferable to the size/epoxy,
as they would create a more rigid fabric surface than would a canvas with only
a size. My worry is that a flimsy fabric with only a size would result in the
cracking of the brittle epoxy over time.
If you think the Sizing → Ground → Epoxy is the best solution , could you
recommend the best grounds + sizing for this application ?
We at MITRA generally do not recommend specific manufacturers unless they
make unique products and any profession grade of acrylic dispersion medium and
ground should suffice. However, I am aware that when used as a size Golden’s
GAC 400 is specifically formulated to create a stiffer fabric, which may be
helpful in your situation. Their recommendations can be found here:
Thank you in advance for your help.