This is a brief and short report on Druckwege(DW) type D clear resin with Mono1 and Mono2 DLP printers. I decided to try this new resin out after I read an article by lenne0815 on Google +. His review is so through that you can easily compare many aspects of the resin to currently popular low cost resins such as Fun To Do Industrial blend (IB) resins. I've been also using FTD IB, Snow white (SW), and Deep black (DB) for many months, so I've also compared the DW clear with FTD IB resins.
You may want to read the lenne0815's review first for any detailed description. I just describe some additional experience and feelings about DW clear. He used 8.9" 60W LCD printer while I'm using Mono1 and Mono2 which are DLP projector based printers, so the difference of illumination sources and light modulators might make some different results.
- Hard prints - The prints out of printer seem very hard and the parts are not cracked as easy as FTD IB prints. I printed exactly same models using DW clear vs. FTD IB red. While DW clear has no cracks after detaching the part from a build platform, FTD IB shows some cracks around weak area. It's not as flexible as FTD IB, but its strong structures are perfect for mechanical prototypes. It's getting more hardness after UV curing.
- Fast curing- With my printers, DW clear is very fast and comparable to FTD IB red. The base time is about 40 sec and layer time is about 3.0 sec at 100 micron thickness and 70 micron xy pixels.
- Less light bleeding - With compared to Autodesk PR48 which is also clear resin, the light bleeding is much smaller and some internal channel structures can be printed successfully, which was not possible with PR48.
- Turns to yellowish after UV curing - It prints out with small yellow tint, but it's getting more tint after UV curing. The brochure describes this additional yellowish tint can be avoided by thermal curing. I've not tested and compared with the two curing methods, but will update if I have a chance to test. PR48 resin also prints out with yellowish tint, but I think DW is more yellowish.
- Good adhesion to aluminum - My general experience is good about the adhesion to aluminum platforms but sometimes it has troubles when I tried to use less base exposure time. However once they're attached, it's very hard to detach after print completion since the model is not flexible.
- No tackiness after curing - The outer surface is completely fix without tackiness.
Fig 1. The first picture shows the difference between DW and PR48. The Rook on the right side is made from PR48 and shows less yellow tint. The light bleeding is better with DW and DW is super fast compared to PR48 (about 20-30x). The T-rex skull is printed out fine. The third one is an endtop mount for my printer and it's a good example of DW resin for mechanical parts. It's strong enough to be used as a semi-permanent mechanical part under low-mid pressure environment. The last one is sample print for dental models. Its hardness is also adequate to pressure molding process.
Fig 2. Comparison between DW and FTD IB red. The print time is almost same.
Fig 3. Transparent but it depends on surface roughness. The top surface defined by a teflon film is very smooth and transparent, however the sidewall is not smooth so that it's rather translucent not transparent. If you need a higher transparent part, you may want to try wet sand polish to improve surface roughness.
In summary, DW clear is not a perfect resin for all purposes, but it's worth to try if you're looking for tough resins that are fast cured. I'm going to test their colored resins (black and white) soon, and I will update any further findings. At least it's a perfect resin for prototyping hard and tough mechanical parts.
** Since I like DW resins a lot, I've asked them to let me resell their resins in US. I'll be getting some initial batches on early of Sept, so please check our online store if you're interested in.