molding-urethane.md

@@ -34,7 +34,7 @@ Everything you need at this step is:
 *  your baking mold.
 *  protection gloves.
 *  a scale. You can also use anything to measure volumes.
-You can find all the safety and processing recommendations for Mold Star 15 Slow and how to use it [here](https://www.smooth-on.com/tb/files/MOLD_STAR_15_16_30_TB.pdf). Remember to check this first. 
+You can find all the safety and processing recommendations for Mold Star 15 Slow[here](https://www.smooth-on.com/tb/files/MOLD_STAR_15_16_30_TB.pdf). Remember to check this first. 
 
 ![3YouNeedMold](/uploads/cc65fb7a22cfeff3e97f543e931e0a2f/3YouNeedMold.JPG)
 
@@ -91,27 +91,38 @@ Casting method
 Once you have chosen the good stiffness, the next step consists in making urethane rubber and pouring it in the silicone mold. This once is the tricky part...
 
 Everything you need for this step is:
-*  
-*  
-*  
-*  
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-*  
-*  
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-* Pouring polymer and crosslinker
-* Adding color
-* degassing the urethane
-* pouring in molds
+*  A and B parts of the Clair Flex.
+*  green So Strong dye.
+*  a cup and a fork to mix the urethane. In this case it is highly suggested to use disposable tools because it cannot be cleaned at all.
+*  your silicone mold.
+*  a syringe.
+*  a scale. You can also use anything to measure volumes.
+*  protection gloves.
+*  a vacuum chamber coupled with a vacuum pump going as low as 0.98 bar (9 inches of mercury). 
+
+Here again, you can find all the safety and processing recommendations for Clear Flex [here](https://www.smooth-on.com/tb/files/CLEAR_FLEX_30_TB.pdf). Remember to check this first. 
+
+You need first to mix parts A and B in equal ratio to make the urethane. Recommendations are to mix it in equal ratio by volume. But it also works quite well in equal ratio by mass and since it is easier, that is this last way we will use here.
+
+You pour a certain mass of part B:
+![17YouNeedUrethane](/uploads/8301e0f739f9bfe1c97a4ee98a19dafb/17YouNeedUrethane.JPG)
+
+You add half this same mass of part A:
+![18MakeUrethane_1](/uploads/423923aa74fa23a824ef54b5455db208/18MakeUrethane_1.JPG)
+
+Note that you can use any elongated tool to conveniently guide the liquid flow out of the bottle. Also note that it is very important to  carefully clean the A part bottle before closing if you do not want the 
+
+And you strongly mix it with the fork taking care of scratching the edges of the cup: 
+
 
 sticky use talk
 
 
 
 
-![17YouNeedUrethane](/uploads/8301e0f739f9bfe1c97a4ee98a19dafb/17YouNeedUrethane.JPG)
 
-![18MakeUrethane_1](/uploads/423923aa74fa23a824ef54b5455db208/18MakeUrethane_1.JPG)
+
+
 
 ![19MakeUrethane_2](/uploads/09480a80fb63f73386b8aedf94101e95/19MakeUrethane_2.JPG)