The present invention concerns methods of manufacturing of adhesives comprising cross-linking first and second molecules each of which has at least one group selected from the group of hydroxy aromatic, dihydroxy aromatic, hydroxy phenone and amino, the first molecule being linked to the second molecule via at least one quinone, together with adhesives produced according to the method. Also provided is the use of same molecules in a method of manufacture of an adhesive. The invention further provides a method of manufacturing thermostably bound solids, together with the use of gelatin, soya and casein in a method of manufacture of thermostably bound solids.