publication_number US 4735660 A abstract a cross linked gel modeling composition of various colors that is cohesively strong but pliable and ductile which results from the addition of wood flour to a waterbased gel using cross linkable guar gum as a gellant application_number US 6752087 A description preservatives useful in the cross linked gel modeling composition of this invention include imidazolidinyl urea diazolidinyl urea 1 3bis hydroxymethyl 5 5 dimethylhydantoin manufactured under the tradename dantoguard by lonza corp zinc borate 1 3chloroallyl 3 5 7triaza 1 azoniaadamantane chloride manufactured under the tradename dowicil 200 by dow chemical co methyl p hydroxybenzoate propyl p hydroxybenzoate and edetic acid and its salts and mixtures thereof wood flour according to this invention can range from unscreened sawdust to a particular particle size such as 100 mesh wood flour the wood flour ranges from about 4 to about 25 by weight of the composition and preferably is about 13 by weight in the instant invention guar gum or polygalactomannan ranges from about 1 to about 10 by weight of the composition and preferably is about 4 by weight the cross linking agent which is used in the guar gum is of the boron oxide type such as boric acid sodium borate or mixtures thereof the mixing procedure comprises two steps the initial step is hydration of the guar gum at an acidic ph the second step is requiring a neutral to alkaline ph the two components of a buffer system can serve each of these conditions any suitable buffer systems can.