Grey V4.1 Modulus Values

General Discussion
1

I know that Formlabs materials are great, and that Grey is supposed to be the “best" of the 3 standard resin colors.

But I find the numbers a tad extreme :

Grey V4.1 White V4.1 Black V4.1
47 MPa 53 MPa 48 MPa
Ultimate Tensile Strength Ultimate Tensile Strength Ultimate Tensile Strength
2 201 000 MPa 2 367 MPa 2 000 MPa
Tensile Modulus Tensile Modulus Tensile Modulus
2 352 000 MPa 2 414 MPa 2 200 MPa
Flexural Modulus Flexural Modulus Flexural Modulus
27 J/m 27 J/m 27 J/m
Notched Izod Notched Izod Notched Izod
10% 8% 12%
Elongation at Break Elongation at Break Elongation at Break
50 °C 55 °C 65 °C
Heat Deflection Temp. @ 1.8 MPa Heat Deflection Temp. @ 1.8 MPa Heat Deflection Temp. @ 1.8 MPa
61 °C 68,2 °C 55 °C
Heat Deflection Temp. @ 0.45 MPa Heat Deflection Temp. @ 0.45 MPa Heat Deflection Temp. @ 0.45 MPa
— 92 MPa 89 MPa
Flexural Strength Flexural Strength Flexural Strength

Most probably someone added a few zeroes. An it kinda throw the material comparator of a bit :slight_smile: :
Compare Formlabs 3D Printing Materials | Formlabs

Edit :
Seeing the numbers I think the HDT of Black V4.1 may be inverted too

1 Like
2

Hi! Thanks for flagging!
I actually can’t reproduce the issue for the tensile and flexural modulus, but we’ll take care of fixing the inverted HDT values.

3

It seems the value of tensile and flexural modulus has been fixed now. I don’t have the issue anymore.
So the Black V4.1 HDT value are inverted ? I was not sure but that would make sense

4

Yes - that was a good catch indeed. The TDS shows the correct data.

5

I haven’t thought of looking in the TDS :melting_face:
The catch was pretty easy as I was comparing the Grey / White and Black resins.
The black being way better at one value and way worse on the other was a bit strange to me.

1 Like