Thames & Kosmos Grow a Crystal handleiding

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Thames & Kosmos

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Handleiding

rod to help dissolve the crystals.

The

hot water will warm the mixture and

dissolve the alum salt. If you still see

a few individual crystals after

repeated stirring, take out the jar and

reheat the water in the pot.

3. Add the dye

When all the alum salt is dissolved

add the packet of dye powder.

CAUTION: The dye can stain clothing

and table surfaces!

4. Crystallization

Place the jar in a quiet, out-of-the-

way location and wait. After just a

few hours, you will start seeing

transparent, angular shapes forming

on the bottom of the jar, which will

grow bigger and bigger within a day

or two. Use an old spoon to fish out

the crystals that you like best and

place them on a paper towel to dry.

Then put them in the transparent

crystal box and close the box. Screw

Tip!

If you don’t get a large enough

crystal to tie on a thread, you can

repeat Experiment 1 multiple times.

You can also save one of the small

crystals and once the solution has

cooled, place it in the solution. It will

act as a seed crystal. Then wait a day

or two. A hand towel can also be

wrapped around the jar as it cools to

slow the cooling process and allow

the crystals to grow larger.

Close the box tightly by pressing the lid and

bottom together. Make sure the lid is

positioned correctly. To open the box, insert a

small screwdriver into the slot on the side and

twist it carefully.

the lid onto the jar containing the

remaining solution and label the jar.

That way, you can continue to

perform experiments with it later on.

The crystal storage box

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