Dr. Ph. Martin'sIridescent Calligraphy Color (Set 1) Ink Set, 1.0 oz, Set 1 Colors, 1 Set of 12 Bottles

Noticed it says these are ok for use on some plastics, not all? which plastic should this paint -not- be used on? would miniature plas./resin be ok?

How are the iridescent calligraphy colors different from their iridescent India ink?

Can these be used with the glass dip pens and metal dip pens?

Can you paint with calligraphy ink?