Aim: To prepare and submit 100 gm of Zinc gelatin paste I.P.
Requirements: Zinc oxide, Starch, Gelatin, Glycerin, Purified water, Mortar and Pestle, Beaker.
Theory: Pastes contain powders dispersed in the vehicle in a quantity of more than 25%. They are usually stiffer, less greasy, and more absorptive than ointments. Pastes adhere reasonably well to the skin and they are suited for application on and around moist lesions. Pastes are less macerating than ointments. They easily may be removed from the skin. They are divided into pastes for application on the skin (pastae dermaticae) and dental pastes (pastae dentifricae).
Formula:
| Ingredients | Standard formula |
| Zinc oxide | 150 gm |
| Gelatin | 150 gm |
| Glycerin | 277 ml |
| Purified water | q.s. |
Procedure:
- Weigh the ingredients accurately.
- Thoroughly soften the gelatin in the purified water, add glycerin, and heat over a water bath until gelatin gets dissolved. Adjust the weight by adding some amount of water.
- Mix zinc oxide in a mortar and then pour over a porcelain tile and allow it to settle. Then cut into pieces and pack in wax paper.
Category: Astringent, Antiseptic, and Antifungal.
Storage: Store in a well-closed container.
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