Jacquard Products Jacquard Alum, 1-Pound


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Make your project a success with aluminum sulfate
Alum is a powdered presoak used to treat fabric or for marbling

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JACQUARD PRODUCTS-Alum. Make your project a success with aluminum sulfate. Alum is a powdered presoak used to treat fabric or for marbling. It ensures that designs transfer clearly to fabric or paper surfaces. Alum is also used with some natural dyes as a mordant. This package contains one pound of aluminum sulfate. Made in USA.


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10 Reviews from Amazon

  1. 5 out of 5

    Jacquard Alum 1 lb worked great! |
    Verified Purchase

    I ordered this to do a science experiment with my children and students where alum is needed to grow crystals (for geodes grown inside egg shells). This product worked great and produced some amazing crystals. Highly recommend.
  2. 5 out of 5

    For Tanning Rabbit Hide |
    Verified Purchase

    I use this product along with plain salt to tan rabbit hides. It helps in the removal of the layer of fat/flesh from the back of the hides, and again to soak the hides for a few days before stretching. it works awesome on both white fur and colored fur. Just whish it came in bigger packages.
  3. 5 out of 5

    Five Stars |
    Verified Purchase

    Worked perfectly for making homemade geodes.
  4. 5 out of 5

    Great for flowers |
    Verified Purchase

    I used this as a preservative for fresh cut hydrangeas. I had more than 60 stems for my wedding, and none of them wilted. I cut each stem under water, dipped it in alum, and then put it directly in water. Much better results than water or flower food alone! I had hydrangeas last up to a month using this method.
  5. 5 out of 5

    Science fair, alum crystals grown |
    Verified Purchase

    The alum worked well for growing crystals for my first graders Science Fair Project. The bag was large enough to allow us to make a few test geodes before beginning the science fair documentation. How to: crack and wipe out eggshells, brush dried eggshell with school glue and dust inside of shell with alum powder. This creates the seed crystal base. Once completely dried, you can place the eggshell into a saturated solution of alum & water... food coloring drops add a nice touch. The crystals pictured took 48 hours to grow.
  6. 5 out of 5

    Used for a Science Project |
    Verified Purchase

    My daughter used this powder to grow crystals out of an eggshell and it sure did work. I highly recommend this powder for growing crystals, it served its purpose well.
  7. 5 out of 5

    good for crystals |
    Verified Purchase

    We used this in my daughter's science fair experiment for growing crystals. ...and it did a remarkably good job at that! Alum is one of the easier crystals to grow, especially if your child wait until the last minute. A lot of crystals take 4-6 weeks. But with alum, you can get *something* within 1-2 weeks. The key is to get a good, supersaturated solution. i.e. boil that water, spoon the alum in, reheat the water if you have to, and keep going until the water can not dissolve any more alum. You will have seed crystals forming within hours. Pick out a good one, tie to some fishing line, and then hang it in the solution. Discard anything else that may be growing. You do not want it to compete with your seed. This is a bit of a rushed approach and you will probably not get the classic octahedron that you may see on the internet. But you will still get something that your child can learn from. Attached below is what we grew. You will notice kind of a pinkish tint to ours. We had food coloring in our solution. We naively thought we might get something like a ruby. But what we learned is that the alum tends to stay with just itself and kick the food coloring out (for the most part). Even though it was very irregular, you can still see how it tried to form triangular shapes. Very, very cool!
  8. 5 out of 5

    Makes beautiful large crystals |
    Verified Purchase

    I wasn't expecting this to work as well as it did. I bought it to make crystals in a jar- all I did was microwave some water, dissolve the salt, let some crystals grow at the bottom, tied the best looking crystal with some fishing line, redissolved the salt and let it grow on the hanging crystal. Redissolved every couple nights and within a week I have a big crystal.
  9. 5 out of 5

    ... for dyeing natural 100% wool yarn and it worked like a charm |
    Verified Purchase

    Used this for dyeing natural 100% wool yarn and it worked like a charm. The mini skeins were dyed using onion skin boiled in water for about 30 minutes. They are (from left to right): no mordant; alum; vinegar; ferrous sulfate. The alum clearly brightens the color and the iron clearly darkens it.
  10. 3 out of 5

    Decent product; works well for egg geodes or crystals. |
    Verified Purchase

    1 lbs of alum powder is not as much as you think it is. It's a bit more than 1 1/2 cups of powder. I used it to make egg geodes and it worked really well. The crystals are very cubic in shape though they aren't perfect cubes. You can get a pretty natural look if you're making egg geodes but if you'd like to deepen the color, just add 3-4 drops of food coloring to the dry crystals and the color with spread and set it pretty nicely. Can get a bit messy if you have anything greater than breathing going on in the room in terms of air current. Okay product all around though mine had some shipping problems.