The thread in this instructable is stiffened with sugar. This may not work for everyone. If you live in a humid climate or if you have little critters around (ants) this may not be for you. Another option would be liquid fabric starch (used here)
, or glue and water (used here
To make the sugar mixture:
Measure equal parts granulated sugar and water and place in a cooking pot on the stove. I used a quarter cup of each which was more than enough. Best to use refined sugar, I only had organic sugar at home which wasn't a pure white which may have coloured the yarn a bit darker.
Bring to a boil stirring constantly.
When sugar is completely dissolved remove from heat and allow to cool.
Pour into a shallow container.
I was able to use this mixture over several days, just cover with plastic wrap and leave at room temperature.