# Resin version 2 **URL:** \ **Category:** General Discussion\ **Created:** [May 25, 2016, 12:48pm UTC](https://forum.formlabs.com/t/resin-version-2/8327 "2016-05-25T12:48:36Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![LukeG](https://avatars.discourse-cdn.com/v4/letter/l/f19dbf/32.png) [@LukeG](https://forum.formlabs.com/u/LukeG)\ **Post date:** [May 25, 2016, 1:27pm UTC](https://forum.formlabs.com/t/resin-version-2/8327/2 "2016-05-25T13:27:11Z")
This info was provided by [Jennifer Milne](http://forum.formlabs.com/users/JenniferMilne) from Formlabs on [this](http://forum.formlabs.com/t/new-resin-formulation/7829/5) topic. Flexible FLFLGR02 This material has greatly improved tear strength and UTS compared to FLFLGR01. You can see comparison of material properties [here](http://formlabs.com/support/materials/using-flexible-resin/). It is also opaque, matte black, vs a translucent pale grey. These changes aim to improve a few things: FLFLGR01 could start to crumble over time, or tear easily Our flexible materials require thicker default touch points. This means you typically have one side with marks and one side which is clean. By moving to an opaque color we think people will be able to achieve better looking final prototypes, especially when using Flexible as an accent to multi-material prototype assemblies. We also improved Flexible by reducing the viscosity which makes it easier to print with so it should be more reliable. The resin will flow more easily in the tank. Clear FLGPCL03 This material yellows less over time. We already reduced yellowing with our second formulation, but in this, our third formulation we aimed to make a more stable color that didn’t change over time. What this means is that when you print a part in FLGPCL03 it might be a little more grey / blue straight out the printer than FLGPCL02, but it will stay the same color over time. So an old part in FLGPCL02 would be much more yellow than an old part in FLGPCL03. You can find the technical properties [here](http://formlabs.com/media/upload/Clear-DataSheet_YgKm6wc.pdf). Black FLGPBK02 This is largely a formulation change as we improve our supply chain. Technical properties did not change significantly. We denote the new formulation number because there are updated print settings and we want to make it possible for people to ensure they use the right print settings and don’t accidentally mix the materials. Tough FLTOTL02 This is largely a formulation change due to a change in our supply chain. You can find the technical properties [here](http://formlabs.com/media/upload/Tough-DataSheet_vmnFB1H.pdf). We denote the new formulation number because there are updated print settings and we want to make it possible for people to ensure they use the right print settings and don’t accidentally mix the materials. Topic regarding mixing the clear resin: [Mixing Clear](http://forum.formlabs.com/t/mixing-v2-and-v3-clear-resin-ok-or-bad/7964). --- _[View the full topic](https://forum.formlabs.com/t/resin-version-2/8327)._