coy
You can use Chromatography.
You can use chromatography
it is really very simple just fit different refills and set the pen in a unique manner that when you want to use red you may press the red ink switch..............don't think that this pens are very complicated but are having an easy design
through the use of gas chromatogarphy or high performance liquid chromatography
Chromatography is used to separate mixtures.In many labs chromotography is used to see whether sweets for example contains prohibited dyes.Forensics use this method of separation to deduce substances.In fact your question is vast.You should have specified what you mean by when
Use chromatography
You could use worldly... or refined...
You can use the technique called chromatography.
prepared
spacious
bash
You could use excellent to describe very good :)
There are many words you could possibly use for the phrase out of production. You could use the word discontinued.
scary, disturbing.
unique, unlike
shin dig
dingle berry