Both are colored drawing pencils, but the BIG difference is the Inktense actually are "ink", meaning once the color dries it is permanent, unlike the watercolor types such as Prisma, which if you lay down a blue, let it dry and add a yellow they will softly blend and make greens depending on how much you work them beca… see more Both are colored drawing pencils, but the BIG difference is the Inktense actually are "ink", meaning once the color dries it is permanent, unlike the watercolor types such as Prisma, which if you lay down a blue, let it dry and add a yellow they will softly blend and make greens depending on how much you work them because they are water soluble. Inktense will NOT react to water after they dry; so that blue you layed down will not "blend" or lift so it may stay very blue looking or look green where the blue shows "through" the yellow. Also the Inktense are brighter and more intense. Buy both, and use watercolor pencils where you want a softer look, and the inktense where you want intensity. see less
By Joseph R Juvenal on June 6, 2014

I use a regular pencil sharpener !!! I love my derwent inktense pencils !!!!!!
By Marcedes Gallagher on January 6, 2014

I guess that would depend on the color you are wanting to achieve. I myself love the baked earth.
By Laura Miller on March 5, 2015

Yes I have used it on Silk, The only thing I can tell you with silk its not like real dyes, like the best dyes out there like Dupont Dyes from Dharma Trading. When I used the Derwent blocks not the pencils... and the pencils do work just as good as the blocks, they are much more easy to use than the dyes. All you do is… see more Yes I have used it on Silk, The only thing I can tell you with silk its not like real dyes, like the best dyes out there like Dupont Dyes from Dharma Trading. When I used the Derwent blocks not the pencils... and the pencils do work just as good as the blocks, they are much more easy to use than the dyes. All you do is wet your fabric and paint with the pencils.. once its dried, you have to HEAT SET the fabric which is silk on a DRY IRON. Remember not to burn your silk if the iron is too hot. If you make a mistake in the fabric with these pencils Derwent, You are out of luck. You can not remove it, there is NO formula to remove the ink dyes. This is similar to Dupont dyes. I like it because I can take this on the planes, and trips like River Cruising where I do not need to work with dyes where they spill and often get on everything. I like this product. The only silk I do not like it on is The shiny silk, I believe its name is Silk Charmuese and Silk Satin, which has a shiny effect to it.. For some reason this does not shine up using this product. For the other silk products which are just regular silk scarfs its ok, but you must understand this is only to be used on Heat Set. After you heat set it, let it rest for 1 day and then you can wash it if you want on gentle hand soap, and let hang to dry. This is unlike the ones on Dupont Dyes, where you have to steam set these if you use Green Label dyes, and Red Label Dyes need to be steamed on the pot on the stove. I like these Derwent if you are traveling. They work very well.. I suggest that you buy, the 72 piece because it gives you the color "White" where as the other colors of 24 or 36 counts does not give you the color White as you may want to soften or lighten colors.. Just remember You must wet your fabric or the dyes, pencils or blocks in order to use it or you will not be able to get the full color you want. Please post messages for me on here.. I accept anyone who wants to know about this product or Dupont Dyes, I am the Expert on these products I have been using them for a very very long time. Have fun... Also just one more word, Why don't you buy some coloring books on Amazon and make your designs with them!!! see less
By panelleplease on November 12, 2015