Cellophane is a "100% all natural" semi-permanent hair color that has no peroxide or ammonia.  But it contains dye I suppose.  Colors such as red ponceaux#4 and yellow#6 etc. are listed among the ingredients. 

First of all, since colors are included, is it really natural?  And could this stuff be damaging to hair in any way?

The other ingredients are Dionized Water, Citric Acid, Salt, Sellosize, Metil and Benzoato Sodium, Quaternium 60 and Propy-tene glycol.

Thanks Bikerbraid, I didn't think about that. 
Do you think I'll experience drying with cassia?  It coats the hair too.

I have tried cassia just within the past few weeks.  That's why when you mentioned that products that coat the hair could be bad, it made me especially worried.  

So far I like the cassia, it made my hair look more conditioned and healtier looking.
I just really have to moisturize and on occasion apply hair serum to combat the stiffness (or "body", which ever you want to call it) caused by the coating.  

I was considering doing henna or cellophane to get a richer brown.  Mainly just to try something new.  Based on your information about the cellophane coating the hair, I'm definitely going to go with the henna because I really can't take any more coats of anything on my hair.  It may look good, but the coating makes it too stiff.  I think that I have too much natural body to use products that coat the hair.

Here's a pic of my hair that I posted in my journal.  This is after the cassia and a trim.

I purchased it online from a company named Henn Sooq, their online address is hennasooq.com.  They're based out of Quebec.  If you do try cassia, I'd like to know how it turns out.  I'm curious as to what the results would be on your hair type compared to mine.

I'm going to put henna on my hair next month.  I'm going to buy it from Morroco Method because apparently their colors are pre mixed and that should make it easier for me.  

Thanks Peachygirl! You're so sweet!