Friday, 13 April 2012

Colour and Texture in Paper Making

George Weil sells a number of additives for the paper maker to use in their papermaking. Here is an overview of their use:

Pigments & Dyes
A pigment can be added to the pulp and the Cationic Retention Aid will help to bind it to the fibres (see Selectasine pigments in dispersion). Pulp can also be coloured using natural dyes, Deka L Direct dyes or Procion MX Fibre Reactive Dyes.
Natural Dyes were sprinkled into the pulp for this
Handmade cotton, find out more...
Cationic Retention Aid
The Cationic Retention Aid helps to bind pigments, dyes and other additives to the fibres in the pulp.

CMC (Carboxymethyl cellulose) powder granules
CMC offers a versatile acid free adhesive which can be added to the pulp to promote fibre to fibre bonding. It gives strength to paper castings and makes the surface of finished art pieces more durable.

Soda Ash
Soda Ash dissolves out the non-cellulose parts of materials such as onion skins, corn husks and bark to be used for handmade paper. Add 250g to each kg of fibre and boil in a stainless steel or enamel pan (not aluminum) for 2-4 hours depending on the fibre.

Titanium Dioxide
This strong white pigment acts as a filler and makes paper whiter and more opaque, giving a smoother surface with less “pick”. Although the filling effect is much stronger than with calcium carbonate, Titanium Dioxide does not have the ability to neutralise acids in the same way.

China Clay
China clay (opal gamma kaolin) is a fine white powder, which is used to make paper more opaque and smooth and reduce shrinkage. It is especially useful in paper casting and will appeal to papermakers and model makers alike.  

Calcium Carbonate
Calcium carbonate provides an alkaline reserve in paper which promotes acid-free archival qualities. It retards shrinkage in paper castings and makes for a smoother surface. In paper sheets it improves opacity and whiteness.

Paper Sizing
Add Paper Sizing to pulp at anytime during the process, to make paper less absorbent so that ink or paint does not run or feather. It improves paper stiffness and helps protects the fibre from oily media as well as dirt and pollution. This alkyl ketene dimer emulsion has a neutral pH and meets archival standards. It is essential if you intend to use your paper for screen printing or artwork.

Visit the Paper Crafts section of the George Weil website to browse the range of materials and equipment for paper making.

4 comments:

Anonymous said...

Excellent blog you have here but I was curious if you knew of any user discussion forums that cover the same topics talked about in this article? I'd really like to be a part of community where I can get feedback from other experienced individuals that share the same interest. If you have any suggestions, please let me know. Cheers!

George Weil said...

Hi, thank you for your comment. You can try the Paper Making forum at Yahoo Groups. You will need to register http://groups.yahoo.com/group/PaperMaking/

Glen Torridon said...

Re the AKD sizing emulsion, can you tell me how much to dilute this by, for adding to the pulp and, if different, for treating finished paper sheets? And on the same theme, can you point me to a source of similar information (application rates) for the other paper additives that you sell?
Thanks.

George Weil said...

Add paper sizing to pulp at any time during the process, to make paper less absorbent so that ink or paint does not run or feather. It improves paper stiffness and helps protects the fibre from oily media as well as dirt and pollution. This alkyl ketene dimer emulsion has a neutral pH and meets archival standards. Essential if you are to use your paper for screen printing or artwork. Use 4% by weight of dry pulp or 2% of wet pulp.

You may find this page in our Fact File will answer further questions about the paper making additives from George Weil http://www.georgeweil.com/fact_file/papermaking_additives.aspx