I make yeast powder cans based on the originals that were recovered from the Wreck of the Steamship Bertrand. 

Our reproduction label is made to look as it would have when it was new.

Over 1200 cans of Preston & Merrill Infallible Yeast Powder were unearthed in the late 1960’s and some of the paper labels survived, being wet since 1865.

The can has an image of a yellow biscuit on a blue field.  There is are two red bands across the top.  All those years underground has caused the red to bleed onto the yellow biscuit and some of the original labels appear orange.  That has led many individuals to make their own reproduction paper labels with an orange biscuit.

This example was sold on ebay. 

In 2006 I bought a cd-rom from Sullivan Press with many digital copies of paper ephemera and labels including a yeast powder label with an orange biscuit and this version appears to have influenced all the others that came after him.   

But how should it have looked when new?

I found two trade cards that have images of cans with yellow biscuits.

This photo of an original does not look orange at all but looks more like gold (which is similar to the later trade card).

Thus we have chosen to have a yellow biscuit since it is more authentic and it looks more appetizing.