Patent ID: 7740900

Claim:
A method of preparing a light-absorbing layer for use in a lamp, said method at least comprising: preparing a pigment dispersion by mixing said pigment with an alcohol-comprising liquid and adding a stabilizer which includes an aminosilane, wherein the pigment is an inorganic pigment; preparing a hydrolysis mixture comprising a silane which is subjected to a sol-gel process; mixing the pigment dispersion and the hydrolysis mixture to form said light-absorbing layer; and applying the mixed pigment dispersion and hydrolysis mixture to at least a portion of a lamp vessel to form the light-absorbing layer; wherein said aminosilane is selected from the group consisting of dimethylaminopropylsilane, (N,N,-dimethylaminopropyl)trialkoxysilane, and a salt of a trimethylaminopropylsilane.