Alum , translating into insoluble glue , prevent warping of the canvas, glue and rotting foundations crumbling paint layer ..

On my website there is a link to the literature and brief method of use.

Purchase.
Dial in Yandex :
Himservis Samara

When working with Himservisom should be able to give an exact himformulu .
Better to buy the substance of foreign firms.

The references I can give myself .

Got it. Do you ever these alums had never seen , not in the hands held.
"Himserviz" ... :D>

In Moscow there Himserviz, and there Himservis.
And I'm glad your insight, and the ability to live and work on the original technology.