Required: gelatine (easy to handle: RUF Sofort Gelatine), glass rod, all-in-one-detergent, wool detergent, 250-ml-beaker, 3 small glass containers (e.g. Schnappdeckelgläser)

Dissolve 30 [g] of gelatine in ca. 400 [ml] of tap water using a glass rod.
This solution is sufficient to feed 12 groups.
Fill the solution into three glass containers (Schnappdeckelgläser zu 2/3 füllen) that are labelled.
Add one spatula of all-in-one-detergent to glass Nr.2 and one spatula of wool detergent to glass Nr.3.
Close them all and shake.
Finally give them for 15 minutes into a fridge.

Observations? – Explanations?

Collagen is a protein consisting of 1014 amino acids.


Additional experiment to show the bleaching effect of the all-in-one-detergent:

Before dissolving the gelatine add a few drops of food colour to the water and follow the instructions as given above