[BASF] A trademark for low molecular weight urea-aldehyde resin. Laropal A-81 is used as a base material in Gamblin Conservation Colors retouching paint. The low molecular weight resin is soluble in low polarity solvents and is said to have working properties similar to natural resins.
° BASF: for Technical Info and MSDS
° R.de la Rie, S.Q.Lomax, M.Palmer, L.D.Glinsman, C.Maines, "An Investigation of the Photochemical Stability of Urea-aldehyde Resin Retouching Paints" International Institute for Conservation, Melbourne Congress, 2000.
° J.M.Arslanoglu, T.Learner, "The Evaluation of Laropal A81: Paraloid B-72 Blend Varnises for Painted and Decorative Surfae:Optical and Aesthetic Properties" The Conservator v.25, UKIC, 2001.