Plasti Pigments Pvt. Ltd. Manufactures Tertiary Butyl Per Benzoate, Plasperox TBP-50. Plasti Pigments Pvt. Ltd. Manufactures various types of Organic Peroxides. The Tertiary Butyl Per Benzoate is a yellowish mobile liquid having ca. 50percentage w/w t-butyl perbenzoate de-sensitised with plasticizers. It acts as an aromatic perester which is a technically pure liquid though it can be hazardous in this form. It is also used as an initiator in curing of unsaturated polyester resins. Followings are the