I like errors and defects too if there were a few runs that got packed out. Foil, ink, blackless and so on. Liking the yellowless errors because they are even rarer than the blackless. Smoltz and Sanders (my favorite) yellowless errors are very rare.
From my "Ask CSG", yellowless thread that got locked for whatever reason...
CMatthews
I was able to confirm "This is not an error we catalog at this time. We would consider cataloging it with more information. For example, the missing black ink 1990 Topps was a result of a known issue happening during the run caused by a foreign object." Thank you!
This is not a bash, I am considering giving CGC a try.
Asking for more info? Card grading companies and their graders should already have the knowledge to grade cards. If I took a diamond for grading and they asked for more information it would be SMH.
If we are talking about a "foreign object" and the blackless, I believe that was the result of cleaning solution that was not removed/dried before the next run. Not cardboard stock, paper or tape... Liquid.
With the change to CGC maybe my 1990 Topps Baseball yellowless cards can get error labels now since they did it with Pokemon.
CGC Cards Error Guide
Types of Error Cards
Insufficient Ink
"the graders did recognize the clear insufficient ink error on this Evolutions Zapdos holo card." *Insufficient yellow ink*
Come on CGC! You did labels for the Fleer Randy Johnson, "Skinned Back" altered Mantle, Robinson with Partial Mantle and some embossed errors that are everywhere.