You are reading this through Penreco's white mineral oil.

Clear white mineral oil is shown as an upside-down triangle. The oil is so clear that the ad’s words can be seen behind it.

You are reading this through Penreco’s white mineral oil.

For complete specifications or test samples, call or contact Penreco, 106 South Main Street, Butler, Pennsylvania 16001. Call toll free (except in Pennsylvania) 800/245-3952. In Pennsylvania call 412/283-5600.

Penreco

White Mineral Oils and Petrolatums

A PENNZOIL DIVISION

Purity is mainly promoted in this ad. Penreco’s white mineral oil is displayed as being so transparent that you can see words behind it. While there is only the oil and a sentence, the way they come together conveys to other companies that their oil is of the highest quality.

Christy Lam