Opened once, kept for years
On this page11
Most storage problems on these shelves are about access
A sorted set of bits or clips is opened daily, and the question is whether the right one can be found quickly. Frequency of use drives the answer.
Scenery material is the opposite case
A section of layout is built, the remaining half packet goes into a jar, and it is next opened when the next section is built. Which might be two years later.
So the governing question becomes what survives being left alone
Not how fast it can be reached. Which changes the material preference and changes what the closure has to do.
Ground foam and foliage are dyed polymer and they fade
Light is the agent, and a container that passes light passes it for the whole two years rather than for the few seconds the jar is open. The amber and dark amber rows on this shelf exist for exactly this reason on other shelves.
There are 34 of them here
32 amber and 2 dark amber of 251, against 91 clear. So the part of the shelf that blocks light is a seventh of it, and it is the part a long term store wants.
Which sits awkwardly against the reason to want clear
A jar of unidentified green foam has to be opened to be identified unless the jar is clear or the lid is labeled. Long term storage wants the amber; finding the right jar wants the clear.
The resolution is the lid rather than the body
A written label on an opaque jar answers the identification question without giving up the light protection, and 179 of the 288 closures on this shelf are plain continuous thread lids with a flat top to write on.
Lichen is the one genuinely perishable leaf
Preserved lichen is kept pliable by a treatment that dries out, and once it is brittle it crumbles rather than bends. A sealed jar slows that and does not stop it.
And stone ballast is the one that does not care at all
Crushed rock is indifferent to light, air and time. For ballast the container is purely an organizing decision, which makes it the leaf where the cheapest adequate jar is the right answer.
So the group spans the full range of storage demands
One leaf that needs nothing, one that needs a seal, and two that need light protection and a label. Which is why a single recommendation for this group would be wrong, and why the family count on the next page is the measurement that helps.