🇺🇸 Retired veteran, father, rock-climbing expert & rosin connoisseur
Whether purchasing rosin at the dispensary or pressing your own at home, proper rosin storage is critical in preserving the quality and freshness of your favorite solventless product.
Top variables to consider when selecting a storage method include material, heat, light, and air transfer. The goal is to minimize reactions between rosin and the material of the storage container, reduce heat and light exposure, and achieve an air-tight seal. In doing so you’ll prevent dissolving/leeching, oxidation, terpene evaporation, and light degradation, which are all things to avoid when storing rosin.
So how do you go about choosing the best way to store your rosin?
The first consideration is the amount of time you’re planning to store your rosin. Short-term storage solutions are not necessarily optimal for long-term. Certain materials interact with the high levels of acidic terpenes found in premium rosin, creating chemical reactions that negatively impact on your rosin.
FEP sheets are a fantastic option for short to medium-term rosin storage. These transparent sheets available from The Press Club are resistant to terpenes, durable, easily foldable, and non-stick. They offer the added benefit of showcasing the color and purity of your rosin, as the rosin is stored between the folded sides of the see-through FEP sheet.
When storing in FEP sheets, consider placing the sheet inside a glass jar in a cool, dark space, as the sheet itself won’t block light, heat, or air transfer.
Parchment paper can be used for short-term storage as well, offering similar benefits as FEP sheets. Look for parchment that’s food grade and coated with silicone on at least one side, which reduces the interaction between the rosin and the paper itself, and also makes for easy rosin collection when it’s time to dab.
With both FEP and parchment paper, it’s a good idea to keep everything inside an airtight container that blocks out light in a cool, dry place.
Silicone containers offer another good short-term storage option. These small containers eliminate light contamination and provide an easy release for the rosin when it’s time to collect. Rosin is less “sticky” on silicone surfaces, giving it a bit more convenience to work with than glass.
However, the downside with silicone is that it reacts chemically with terpenes over time. The acidic terpenes in rosin will actually dissolve silicone and negatively impact quality. If you leave high quality rosin in silicone for a week or more, you may notice some flaking along the inside of the container where the terpenes are actually breaking down the components of the silicone.
For long-term storage, this is definitely something you want to avoid.
Glass is the way to go when looking to store your rosin for more than a week or so. Store your rosin directly inside a glass jar that has a lid with an air-tight seal. Although the rosin will stick to the glass more than it does to silicone, with glass there is no chemical reaction to take place between the compounds in your rosin and the material of the container.
In terms of reducing chemical transformations of rosin over time and preventing evaporation and oxidation, glass is the way to go. Be sure the glass is kept in a dark, cool, and dry environment and you will have fresh, high-quality rosin to look forward to for many weeks to come.
There are several ways to store your rosin, and each has its appropriate use case. Whether you’re gifting a gram to a friend and want to showcase the beautiful color of your rosin in a clear sheet of FEP, or you have an ounce to preserve over the span of several months in a glass jar, knowing your options and the benefits of various storage methods enhances the enjoyment of your favorite cannabis concentrate.