FAQ

Frequently Asked Question Topics:

All Frequently Asked Question:

What color concentration do you recommend for your photoactive resins?

Our resins can be mixed with dyes and pigments at varying concentrations. For functional purposes, as controlling cure depth, concentrations between 0.25 and 2% by weight have been used.

This is: 100g resin contain between 0.25 and 2 g dye or pigment.

Our new hiperdispersed pigments (Red, Yellow, Black) are much more concentrated and need less of it to work in a similar fashion as the previous pigments. Rarely will you need more than 0.8% from these to work the same as their older counterparts.

Do you have a product that compares to ABS?

Our Spot-HT is the most suitable solution for applications that need very high hardness and toughness, with a measure of flexibility.

What are the typical build area sizes that DLP 3D printers use?

This depends a lot on the output power, desired resolution and setup the printers use. The most common build envelopes in the XY plane range from approx. 50x40mm to 100x80mm. This for off the shelve DLP projector printers with no image shifting and XY resolutions between 0.025 to 0.1mm.

Do your resins need to be post-cured?

Sometimes, if your exposure time is chosen to be short or your color concentration is relatively high you will need to post-cure the finished object. You can do this quite easily and effectively exposing it to the sunlight or to fluorescent light. Tungsten Halogen works as well, but the best results are achieved if the curing light has some part of UV spectrum.

Sunlight or “Black Light” fluorescent lamps are quite effective and finish curing the object in minutes. UV light is also used to reduce the tackiness feel of the surfaces.

What is 1kg and 5kg in imperial units?

1kg are 2.2 pounds and around 1 quart.

5kg are 11 pounds and around 1.2 gallons.

How fast do your photoactive resins cure?

This depends on the power output and the wavelengths available from your light source.

The more UV and/or blue light your source has, and the higher the intensity, the quicker our photoactive resins will cure. As a guideline, the time to cure a 0.1mm layer of resin, without any colorant stands between 1 and 15 seconds, using an unmodified DLP projector with an UHP lamp.

Where are you located?

We are located near Barcelona, Spain, mainland Europe.

Can your resins be used to create RTV silicone molds?

Our Spot-HT resin has been tested to work for silicone molds.

The silicones that have been tested successfully are Tin-cure RTV silicones, such as  Silpak R1348, or Smooth-on Tin-Cure Silicone Rubber.  You can cure the silicone around the print without the need of a coating.

On the other hand, Platinum-cure resins are much more sensitive to trace amounts of catalyst inhibitors. We have had several reports that these silicones will not cure completely on the surface of untreated, fresh prints. We recommend post-curing the prints thoroughly with a low wavelength (365nm or less) UV oven and using a Polyviny Alcohol (PVA) release agent to cover every surface of the print that will come in contact with the Platinum catalyzed RTV rubber. Similar protective barriers are also available as acrylic varnishes. The PVA barriers can be dissolved with water but the acrylic ones are permanent.

Do you provide samples of your products?

We have lately scaled down our sample delivery program, due to the overwhelming requests we have received. Currently, handling and shipping costs for such small volumes make the sample program not much more attractive than ordering a full 1kg package.

So we have decided to reorient our samples program to those of you that are developing a significantly different technology, as well as users of popular and widespread devices that we do not yet offer products for.
If you are in the above case, please contact us with details of your intended tests so that we can offer technical assistance and samples that best would suit your application.

Do your resins work with DLP projectors?

Yes they do! If your intention is to use our resins with standard, non-modified DLP projectors, you can use our high or medium reactivity ranges, depending on your optical power output, as they have been tested in such setups. By non-modified DLPs we mean that they still house all their UV and IR filters as well as the color wheel.

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