i have a glass blowing acquaintance who has just provided me with several sheets of tempered glass, saying he would love to see photos printed on them. i have a couple of questions....
1) should he sand blast them to give the surface a bit of tooth?
2) what is the formula for the gelatin coating? the james' book mentions a 3% solution of gelatin and formalin. i see there is glyoxal on the b+s site listed as a subsitute for formaldehyde, shall i mix that in with the warmed gelatin solution? and if so, how much?
i apologize if this has been covered elsewhere. and horror of horrors, it appears i have misplaced my post-factory library during the cross-country move! so i cannot look up the galina article in #5. :(