Reviews
Part of An honest review of printmaking supplies
Printmaking Supplies: Date Labels and Stock Rotation
A practical routine for printmaking supplies: mark received and opened dates, rotate older stock forward, store film flat, and keep spent baths separate.
What to take away
- Date every container of printmaking supplies on the day it arrives, not on the day you open it.
- Rotate stock. First in, first out, applied to a shelf of ink, saves more money than any discount.
- Plastic film positives and screen mesh both age. Store them flat, dark and cool.
- Keep spent materials separated by chemistry so that a disposal decision remains possible.
Dating and rotation
Write two dates on every container: received and opened. For example, label each container Received: [date] | Opened: [date], filling in the received date when it arrives and the opened date when first opened. The gap shows how long stock sits unopened and can help you adjust how far ahead you buy; it is not a shelf-life limit.
Dating and rotating stock
- Write received and opened dates on container
- Gap reveals if you buy too far ahead
- Put new stock behind old
- Work from the front of the shelf
- Keep a short list on the shelf edge
Then rotate. Put new stock behind old, and work from the front. This sounds trivial and it is the reason most studios discard usable ink: a newer tin was easier to reach, so the older one dried out untouched.
Keep a short list on the shelf edge rather than in a file. The list you can see is the list you maintain. At each routine stock check, scan the received and opened dates and the condition of the stock.
Storage priorities by material type
| Material | Typical behavior | Storage priority |
|---|---|---|
| Oil-based relief ink | Very long, skins on top | Airtight, surface covered |
| Water-based ink | Shorter, dries in the tube | Sealed, cool, cap threads clean |
| Screen emulsion | Limited, shorter once sensitized | Dark, cool, dated |
| Paper | Long, sensitive to humidity | Flat, dark, stable room |
| Mixed chemistry | Short, sometimes hours | Do not store; mix as needed |
The rule that saves the most trouble is the last one. Mixed working solutions are not stock; they are in-process material. Mixing more than a session needs converts a supply into a disposal problem.
Shelf life by material
Material
- Oil relief ink
- Very long
- Water-based ink
- Shorter
- Screen emulsion
- Limited
- Paper
- Long
- Mixed chemistry
- Short
Behavior
- Oil relief ink
- Airtight, covered
- Water-based ink
- Sealed, cool
- Screen emulsion
- Dark, cool, dated
- Paper
- Flat, dark, stable
- Mixed chemistry
- Do not store
Storage priority
- Oil relief ink
- Water-based ink
- Screen emulsion
- Paper
- Mixed chemistry
Films, screens and other plastics
Film positives, mesh and plastic sleeves all age faster warm. Plastic supports matter because the base fails first.
The National Archives' film-based records preservation guidance notes that the stability of the film base is one of the most significant factors in the long-term preservation of film-based materials. So acetate materials are stored cool and monitored for the vinegar odor that signals decay.
For a studio, store film positives flat in a folder, not rolled in a tube, and keep them out of a warm loft.
Replace any warped ones instead of trying to print through the distortion.
Keeping spent material separable
In the United States, the Resource Conservation and Recovery Act (RCRA) and U.S. Environmental Protection Agency (EPA) regulations govern hazardous-waste determinations. Some spent materials fall under the toxicity characteristic, defined in 40 CFR 261.24 and evaluated with the Toxicity Characteristic Leaching Procedure (TCLP), which tests an extract against listed contaminant concentrations rather than relying on appearance. Nothing about a used solution's color tells you which side of that line it sits on.
That has one direct consequence for storage: never combine spent baths. A separated container can be identified and routed. A mixed container can only be treated as the worst of its contents.
Our printmaking supply cost overview explains why shelf life is one of the three numbers that decides a budget.
Store the newest stock where it is hardest to reach. Rotation fails because convenience beats intention, and the simplest fix is to make the wrong choice the more awkward one.
