Glue and casein
In what proportions is cellulose glue mixed with water? The mixing ratio of cellulose glue with water depends on the purpose of its use: for priming, the ratio of adhesive to water should be 1:80; for sticking light wallpapers 1:70; for normal wallpapers 1:60; for heavy wallpapers 1:50. The special adhesive contains plastic dispersion additives and requires less water to be added; as a rule, it is mixed with water in a proportion 1:20.
What types of wallpaper can be used with normal glue?
For wallpapering, use the glue provided by the wallpaper manufacturer. As a rule, normal glue is suitable for sticking plain colored wallpapers, double-printed thinner wallpapers, embossed and cork wallpaper.
For which wallpapers the special glue must be used?
Special glue must always be used, when required by the wallpaper manufacturer. As a rule, it is used for sticking heavy wallpapers that are printed twice, wallpaper with a cover of raw fibers, velor, from the carcass itself, textile, from natural materials, some cork wallpaper, wood wallpaper, plastics and wall murals. To stick certain wallpapers you need to mix a special glue with a dispersion glue. This is the case, for example,. for metallic wallpapers.
Klej skórny z odpadków skórnych do gruntowania kredowego pod pozłotę pulmentową.
The glue from skins from the scraps of skins nowadays only in special tanned cases.
Klej zajęczy ze skórek zajęczych obecnie już tylko w przypadkach specjalnych.
Fish bone glue now only in special cases.
Klej kostny z kości do gruntowania kredowego pod pozłotę pulmentową.
Glue from the sturgeon bladder to the gilding behind the sturgeon glass.
Calfskin gelatin to gilded behind glass.
How casein is made?
Casein is a protein substance that is released from sour milk. To make it soluble in water for painting purposes, basic additives are introduced, e.g. slaked lime.
In what proportions lime and casein are mixed in the production of calcium casein?
To get lime casein, you have to take 5 casein parts on 1 part of lime. In practice, a small amount of casein is added to the lime paint just for this purpose, to improve its functional properties with this additive.