There are 6 different colors of silks mentioned here. The exact color of the silks may very from slave to slave depending on the likes and dislikes of each Owner. The colors mentioned here are more for description of the type of slave than actual color of their silks.

The white silk slave is not necessarily a virgin, merely reserved for her Master/Mistress's sole use. They are generally permitted to serve drinks and food and conversation but sexual use is forbidden and corporal punishment is at the hands of the owners.� Masters and Mistress's insulted, may embarrass, confine or display the slave, but may not strike in any way nor permit another to do so. They do not use the term "slave heat" except in serves to their Owners.� There is some controversy in using this term as many Goreans feel only a "true virgin" should be white silk, this view varies depending on the region of Gor.
Assassin of Gor pg 88 and Explorers of Gor pg 172

The yellow silk are girls still in training but may begin to serve with their heat. The girls may lap and fur with members of the city only. As in the white serve be descriptive and be sure to say what is happening and what a girl is doing.
yellow silk also denotes the Tavern or city owned slave.....her use is rented and negotiated with the Tavern owner and may include sexual favors at the owners discretion. These girls are the Paga girls of Gorean novels
Vagabond of Gor pg 400

The red silk has the mark of a pleasure slave....may generally be used by any who desire her usage but may be reserved for the sole use of the owner. A pleasure slave is considered to be well trained to please in all ways sexual, service wise and in dancing.True "passion slaves" are bred for that purpose specifically, one that has been bred for a particular trait, such as beauty or slave heat or the shape of her lips and no barbarian can attain that rank. They usually have a club foot from inbreeding etc.
explorers of Gor pg 200

GRAY� SILKS

The gray silk is a state owned slave.
Magicians of Gor pg 18

BLACK SILKS

The black silk is the mark of an unowned unpurchased slave.
no referenced found in the books

PURPLE� SILKS The purple silk....a plastic material worn by the slaves of the Priest-Kings.
Priest-Kings of Gor pg 90

In no way will a slave be yelled at, nor be made to feel stupid as they learn. W/we all are learning.

White to Yellow

1. Know 6 positions and be able to perform them well, showing as much description as possible.

2. Know the slave silk colors and the meaning of each.

3. Know 5 slave types, and be able to give a good definition of each one.

4. Know 10 general rules for a slave.

5. 5. Know 10 general rules for the City.

6. Know at least 3 foods, tell what each is, the way it is prepared, and how it is served.

7. Know at least 3 drinks, be able to give a good description of them, how they are served, such as the vessels used.

8. Serve with a good amount of detail and description.

9. Know the city greeting order

Yellow to RED 1. Know 5 Castes.

2. Know the slave prayer.

3. know the slave mantra.�

4. Perform a dance, make it personalized to you.. Use props if needed. Keep the dance flowing, and keep the posts from 5 to7 lines in length, also no more than eleven post.

5.Know the basics of Medical Serves and items to be found in med kit.

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