Abstract: The present invention relates to a surfactant composition comprising: a) at least one anionic surfactant, and b) at least one compound chosen from amphoteric surfactants and non-ionic surfactants, wherein the total active material of said surfactants ranges from 25 to 70% by weight relative to the total weight of said composition, wherein the anionic surfactant ratio is from 0.2 to 0.9, the amphoteric surfactant ratio is from 0.0 to 0.8 and the non-ionic surfactant ratio is from 0.0 to 0.8, said ratio being the ratio of the percentage by weight of active material of said surfactant in said composition to the percentage by weight of total active material of said surfactants in said composition, the pH of the composition being between 4 and 9, wherein said at least one anionic surfactant is chosen from the group consisting of alkyl sulfoacetate, isethionate and sodium lauroylsarcosinate.

Abstract: A security grill structure for preventing entrance through a wall opening. The grill structure comprises a metal peripheral retention frame securable in the wall opening. The frame has opposed parallel channel members interconnected by opposed transverse bars. A lock is provided in one of the channel members and is operable from an inside face of the retention frame. A grill engaging element is secured to each of the transverse bars. A removably engageable metal grill is receivable in an opening defined by the peripheral retention frame and is engageable by the lock, the other channel member and the grill engaging element.