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Re: [BKARTS] Gluing large sheets to board



On Sep 12, 2007, at 4:06 PM, Andie Thrams wrote:

I am seeking tips for gluing large sheets of paper (19x 25") to book board... how to avoid wrinkles and bumps, curling, etc. Is this a good time to mix wheat paste and PVA?


Many others have suggested various methods of getting adhesive on the sheet. Brushes are good, but rollers are certainly easier.
The adhesive can be glue, wheat paste, or a mix of PVA and methyl cellulose, but you must understand the dynamics of the completed board ---- different adhesives on different materials will '"pull" the board in different ways.
As to an adhesive, my preference is a mix of 50% PVA with 25% methyl cellulose and 25% wheat paste. The wheat paste allows the adhesive to stay tacky for a longer time, whereas the MC with PVA simply slows the drying. In other words, I have found that the 50/50 PVA + MC mix is either wet or dry with little tack-time, but the addition of the wheat paste improves the working properties.
Now, it is very important, as also suggested, to allow the paper to relax sufficiently to avoid bubbles. Therefore, it might be necessary to apply the adhesive more than once, thereby allowing the paper to relax and yet keep it sufficiently wet for adhesion.
One important tip for large sheets that has not been suggested is to roll or fold (do not crease) the sheet almost in half with about 2 inches of one edge with adhesive exposed --- much in the way that one would handle wallpaper. The exposed edge with adhesive can now be easily positioned, and then once it is properly aligned and lightly pressed, the remainder of the sheet can be unfolded and bubbles can be worked out and eliminated as the remainder of the sheet is put- down (use your hands to work out the bubbles; be sure that you are not wearing rings or other jewelry).
Also, do not force some areas flat with a bone folder. If the adhesive was applied in a fairly uniform manner, any slight variation in the finished surface should disappear when the paper is finally dry. By overworking an area that shows while wet, could make it show even more after it has dried --- this is another point in understanding the dynamics of the materials that are being used.
Good Luck,
Bill Minter


******************************

William Minter Bookbinding & Conservation, Inc.
4364 Woodbury Pike
Woodbury, PA  16695
814-793-4020
Fax:   814-793-4045
Email:    wminter@xxxxxxxxxxxxxx




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