Soul Record label - Red Wax issues

[woodward]

I was doing some inquiring on eBay just now and came across some interesting records that I was unaware of.

Soul 35021 Function at the Junction - Shorty Long RED COLORED VINYL
Soul 35022 What Becomes of the BH - J. Ruffin RED COLORED VINYL
Soul 35029 Good Night Irene - Originals RED COLORED VINYL

Now, all of the above were on the standard Soul label not marked as promotional or DJ. Flip sides were identical to the "A" side.

I also saw Motown 1377 Theme from Mahogany by D. Ross. It was a gold vinyl record with a different "B" side instead of same "A" and "B".

Can anyone shed any light on the pattern of red colored and gold vinyl?

Thanks.