What Is the Rosin Technique & How to Make Rosin Hash

The rosin technique is the home-made hash project that every cannabis enthusiast has been waiting for. Requiring only the most basic of household items and some good cannabis flower, everyone can make good quality marijuana rosin in their very own homes.

What is rosin?

The Rosin Technique as a form of solventless extraction has been getting a lot of media attention lately – especially for the fact that it does not require a solvent. There are plenty of cannabis extracts on the market these days, but not many of them offer the advantages of being solventless.

Chemicals and other contaminants can end up in the final product of cannabis extracts, such as trace amounts of butane ending up in BHO. The Rosin Technique, on the other hand, can be used by just about anybody at home and doesn’t come with the threat of combustible chemicals. With just a few household items and some good cannabis, anybody can make rosin at home.

The technique of making rosin hash


noun, also called colophony

Chemistry: The yellowish to amber, translucent, hard, brittle, fragmented resin left after distilling the oil of turpentine from the crude oleoresin of the pine: used chiefly in making varnishes, varnish and paint driers, printing inks, and for rubbing on the bows of such string instruments as the violin.

Although the above definition refers to all types of rosin, marijuana rosin is something relatively new. Thanks to YouTube sensations and online DIY masters, the technique of making rosin out of cannabis has only recently been popularised.

Rosin hash on a white paper

Hash has been part of cannabis culture since the beginning of time, really. Traditionally, it was made by rubbing the buds between the palms. The resin collects on the palms of the hand, after which it is scraped off and collected together.

Since the good old days, hash and other extracts are made using different technologies and different solvents. Most people wouldn’t have the expertise or the tools to make hash at home. Rosin, on the other hand, is something like the “new age” finger hash. You need almost nothing to make it, it’s fast and the final product is definitely something to rave about.

The advantages of making rosin hash

The most obvious advantage of rosin is that anybody can make it. If you’ve got some good quality cannabis, then you’re more than halfway there.

Another advantage of rosin, which we’ve gone through already, is the fact that no solvent is required to make it. Firstly, this makes it simple and easy to produce. Secondly, it means that the final product is essentially safer, there’s less chance of contamination and more chance of a smooth, delicious high.

Even for commercial cannabis producers, rosin is an enticing technique. It’s a very efficient way of extracting the most potent parts of the cannabis plant. Plus, the fact that it is solventless preserves the most appealing parts of the plant without the contamination factor. And this is a great selling point for commercial producers.

How to make rosin

If you’re a DIY enthusiast, this is absolutely a project you’re going to love. All you need is:

  • a hair straightener
  • parchment paper
  • cannabis flowers
Purple hair straightener against the white background

Anybody who’s reading this for the first time is wondering why they ever paid so much for hash when all you need to make it is a hair straightener and some good buds. Well, that’s a sensible thing to think because it really is that easy.

You simply fold the parchment paper and sandwich the weed between the two halves. Then, place the parchment with the weed inside between the hot plates of the hair straightener and press down. You will hear some sizzling happen, and that’s when you know it’s time to take it out.

Making rosin hash

When you remove the bud, there will be a patch of marijuana resin collected on the parchment paper. After letting it cool down for a couple of minutes, you should be able to scrape the rosin off the parchment.

Rosin hash ready for use

Rosin: Safe and homemade hash

There is no excuse for smoking poor quality hash anymore. You can make it at home with a hair straightener, fellow cannabis enthusiasts. And from experience, we know that many cannabis lovers are usually lovers of DIY, especially those who grow their own plants.

A man consuming rosin hash

Solvent-based extractions are less and less appealing to cannabis users who know the potential risks involved with producing and using these kinds of extracts. Rosin, on the other hand, offers an alternative solution that’s just as good. Plus, anybody can make it without blowing up their entire kitchen.

It’s no wonder that even commercial manufacturers are making rosin to sell in dispensaries. Why not? It’s easy, cheap to produce and the final product is outstanding. Enjoy making rosin at home, and if you haven’t already, check out the step by step guide from Cannaweed in the video above! (it’s in French, but all you need is the visuals right?).

  • Disclaimer:
    Laws and regulations regarding cannabis use differ from country to country. Sensi Seeds therefore strongly advises you to check your local laws and regulations. Do not act in conflict with the law.


4 thoughts on “What Is the Rosin Technique & How to Make Rosin Hash”

  1. I’ve heard its better to press slow, building up pressure then pause for 20 seconds. So the oil has a chance to move through. If its difficult to collect a warmer/colder table will help

  2. How much THC is in rosin hash ?
    Extraction IPA give 90% THC oil.
    You try tell us rosin hash have some like RSO – 90% + THC ?

    1. Scarlet Palmer - Sensi Seeds

      Hi Peter,

      Thanks for your question. The highest potency of any extract will depend on the quality of the starting material. Rosin averages about 70 – 80% cannabinoids, and an estimated 10% terpenes. I hope you continue to enjoy the blog.

      With best wishes,


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    The Sensi Seeds Editorial team has been built throughout our more than 30 years of existence. Our writers and editors include botanists, medical and legal experts as well as renown activists the world over including Lester Grinspoon, Micha Knodt, Robert Connell Clarke, Maurice Veldman, Sebastian Maríncolo, James Burton and Seshata.
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