Disposal of "empty" ink containers

When we had to dispose of gallons of waste ink, we always had a hazardous materials disposal company leave a 50 gallon barrel and called them when it was filled.
With paint, most states are okay with you adding kitty litter, so it doesn't seep.
Stickly speaking, I doubt just throwing your ink cartridges in the trash is EPA approved, but it is how most people dispose of them.

 

Check in the MSDS card, there's a section about waste disposal. You'll find information there - usually ink containers are treated as uncured ink and should be utilised by a special company.

 

We called one company and were left waiting for months to get a quote, might be the one you mentioned in your post OP. We called another company and they brought out a couple of drums; one for waste ink, one for the bladders a couple weeks later.

 

Our local city sanitation department does a free drop off once a year of hazardous waste.
So we bring them 10 to 15 gallons of waste ink.
But I like the kitty litter idea.