, ortho-silicates, or hydrates thereof having the formula x(SiO2) (M2 O), where x varies from 0.5 to 3.75 and M is an alkali metal; and said alkali metal phosphates are alkali metal monobasic-, dibasic-, tribasic-, meta-, pyrophosphates, or hydrates thereof; 6. up to about 10 weight percent of an oil selected from the group consisting of mineral oils having a viscosity range of about 34 to 360 Say