I decided to carry out a comparison between the makerjuice and formlabs resins. I wanted to carry out a proper stress test and so I picked out the following engine block model.
This model is a good one as it has several flat surfaces, several curves of varying degrees, thin walls, holes and text. I printed it at a 50% size (just to fit it in the printer) and printed at 100micron layer thickness. I printed the formlabs using the black setting and the makerjuice on the grey setting as they recommend for all their resins. Black resin was used in each case. I used a brand new resin tank, printing the makerjuice first, emptying it, cleaning it then printing the formlabs. The build platform was properly cleaned before and after each print as well. Prints were removed straight after printing and dipped in 99% alcohol to remove excess resin.
I guess I should say at this point I have no affiliation to either company and have done my best to keep the test fair between the two resins (but if anyone wants to send me some free resin I would grudgingly accept!). I am using my printer for a business application so this kind of comparison is obviously important to my bottom line!
Here are the prints in preform with supports added. If anyone else wants the file let me know. It’s around 24mb big so we will need to work out how to transfer!
There were no issues during the printing process. The printer worked well in both cases.
And now on to the results. I should mention that I haven’t removed all the smaller supports and haven’t sanded the parts at all. For all photos, formlabs on the left, MJ on the right.
On first inspection it doesn’t appear to be too bad a print in both cases. The MJ is noticeably lighter in colour and and lets light through on the thinner parts.
As I moved around the models, I was impressed at how sharp the various holes and flanges were on the FL print. MJ not so much.
Not too bad on this end. You can see the light coming through the MJ print. Again the lines aren’t as sharp.
Pretty much the same story on this side. You can also start to see areas to the left at the top that didn’t properly cure on the MJ print.
And now it really goes wrong This is the side that was most supported and pointed towards the build platform. The MJ print looks horrific. A lot of detail missing and it looks like extra resin has set all over it. There is a bit of work required on the FL side but it’s nowhere near as bad.
The text barely came out on the MJ print but was clear to see on the FL print.
Again the underside was heavily supported and it shows on both prints, MJ being worse again.
In conclusion, for small detailed, dimensionally important pieces I could not recommend the MJ resin. If dimensions aren’t as important and you are dealing mainly in curves the you could get away with the MJ. This result really disappointed me as the MJ is a good bit cheaper than the FL.
I’d be interested to see if anyone else has done a similar comparison.