Ok your at home, you get the thought in your head “Id like to make a batch of rosin” You have the material you have the press or hair straightener the parchment paper and the know how. But be dammed if your material is a little north of the recommended relative humidity of 62%, and what you do not have is the means or time to go on amazon and buy some “Boveda” “Integra” packs or similar such product. Maybe your just cheap and want to save a penny where you can or still maybe you like myself like to combine being frugal with the satisfaction of doing something at home on your own on your terms simply because it makes you feel good.
There have been multiple armchair studies and even a few white coat ones that have nailed down the best relative humidity to maximise your rosin production and they have almost all come to the conclusion that 62% RH is the magic number. This is enough to stop your starting product from being so dry it acts like a sponge reabsorbing all the magical elixir you produce but not so wet that you end up with hitchhikers tagging along with the rosin, things like chlorophyll, waxes, and so on.
Whatever your reasons Im going to give you a simple meat and potatoes way to make a 62% RH solution that you can place in with you herbal material to help achieve that goal. There are many ways to do this and many different recipes each with a strong following of experts that will tell you their way is the right and only way. Im not here to argue that point of view Im going to pass on what I’ve come to use for no other reason than its fast and just about any idiot can whip up a batch with what’s already in the kitchen no need to buy special ingredients save that for when you have more time or money for now Im going to show you the quick n dirty way that works!
Time to go rummaging through the kitchen cupboards as you will need the following items:
-A scale is very helpful, you would need one that can weigh out grams. most kitchen scales measure in one gram increments so you will need to do a little guessing to hit the half gram mark.
If you plan to buy a scale make sure it fits your intended use they are not all the same most scales with large total capacities 1000gm and up usually measure in one gram increments and are not as accurate on the lower end as say for instance a scale that only measures up to 500 grams. The smaller capacity scales begin their measurements very low .5 of a gram etc so they are far more accurate when weighing powders etc. Its a kin to a sledge hammer and a finishing hammer both are hammers but have very different uses.
You can also rig a simple scale and use a coin as a counter weight a loonie for instance weighs 7 grams, (the Canadian $1 coin) although you can also simply use a measuring spoon
One table spoon of table salt is about 23 grams
One Table spoon of sugar is about 12.50 grams
-100 ml of distilled water I use tap water or water pre boiled in a kettle
-17.5 grams white table sugar
-70 grams of non iodized table salt.
–A container like a small jar etc big enough to hold all the ingredients (displacement)
-Tyvek or some other sort of permeable material that breathes like Tyvek, a paper bag a swatch cut from the lace curtains etc.
Tyvek can often be found in shipping envelopes the kind often used by UPS or Amazon simply cut it out of the envelope. Most couriers and post offices carry them I hear some even pass them out for free.
Start with the 100ml of water, then completely dissolve the sugar into it, then add the salt stirring until the solution reaches the point of saturation (meaning no more salt will dissolve). There will be a fair bit of undissolved salt left in the bottom of your container.
Then can cap the jar off using Tyvek, or some other water/contaminant resistant barrier, like a paper bag. Just as long as air can pass through.
NOTE: it is really important to dissolve your sugar first, before adding the salt, otherwise the water will be saturated with salt, and there will be no space for the sugar to in the solution.
You can tinker with the recipe a bit:
By adding more sugar you add, the lower the RH.
20g sugar= 51% RH
18g sugar= 60% RH
17.5g sugar= 62% RH
These numbers are only a rough approximation and results will vary depending on many factors including your tools unless you are using lab grade equipment most home models are not dead on accurate looking outside you rarely need to know the humidity to the decimal point to decide to bring an umbrella or not 😉
Now you take your jar ands put it in an enclosed space with the herbal material you wish to re-saturate place your humidity meter inside along with your herbs and watch as the meter changes when it hits around 62% your good to go.
I actually used a summer time juice / ice tea dispenser they are big often square seal air tight. You can find them every summer at Walmart under $20 cdn, or being given away later in the season. People tend to pass them along when they begin to leak but what they do not know is that they leak simply because the spout becomes loose, it is a basic through hull fitting with a spigot on it 2 washers one inside the other outside and a plastic nut inside the container. tighten it up and its good as new. Bad for them good for you unscrew the spigot put some gorilla tape over it and you have a make shift humidor. they are huge and glass and free that’s the trifecta.
There are quite a few variables to take into account but most people in most places find they will achieve the desired relative humidity in a few hours however it could be as long as 3 days. That said even the big well established brand name companies will tell you the same thing, it is usually buried in the fine print though and well after the videos showing it work in 12 seconds. Im telling you 3 days just to err on the side of caution but I’ve never had to wait that long.
Reports vary anywhere between 3 minutes to 3 days depending on elevation above sea level, outside humidity, temperature, quality of product, relative humidity of starting product, density of starting product, how impatient you are (opening to check etc)
Like I said this DIY product is similar to the ones produced by Boveda, Ongrok, Humi-Smart, Integra, it works the science behind such products is not hard in fact is the kind of chemistry you might find in elimentry school. That said it is a DIY product and you may not experience the same results as those provided by companies with years of dedication and experience producing such a product.
Do your due diligence depending on how valuable your starting product is to you it may be worthwhile to do some small controlled tests before you go all in blow the wad in one shot.