Blu by Siraya Tech - user guide
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User Guide for Blu and Blu Clear
For other resin user guides, please visit https://siraya.tech support section
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Blu is developed to be a strong resin that has high resolution, precision, and is easy to print. It is tough and hard enough for making functional parts yet easy to print and clean for general use.
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And it should not stink up user's work environment
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Due to higher polymer content for its outstanding mechanical properties, the ideal printing condition for Blu is over 25C.
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If user can maintain a resin temperature of 30C, the printing time could be further reduced
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Check out recommended support settings if you have print failures
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Exposure For Blu only (Not Blu Clear)
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Recommended
Resin Temperture 25-35C
Room temperature 20-28C
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PrinterLayer HeightExposure (s)
# of Initial Layers
Exposure for Init LayersExposure (s)
# of Initial Layers
Exposure for Init Layers
Note
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Photon50um11-12 (s)460 s12-13 (s)690 s
10mm lift distance help with support facing side surface
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Photon-S50um10 (s)460 s11 (s)675 s
10mm lift distance help with support facing side surface
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EPA X150um9 (s)445 s9 (s)675 s
10mm lift distance help with support facing side surface
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EPA X1100um12 (s)475 s12 (s)690 s
10mm lift distance help with support facing side surface
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Elegoo Mars50um10 (s)450 s11 (s)660 s
10mm lift distance help with support facing side surface
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Shuffle50um9(s)575 s
10mm lift distance help with support facing side surface
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Shuffle XL50um12(s)575 s
10mm lift distance help with support facing side surface
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D750um9(s)575 s
10mm lift distance help with support facing side surface
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Inkspire50um11s450 s12-13 (s)690 s
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Moonray50um
use settigs for nextdent Ortho rigid
use settigs for nextdent Ortho rigid
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Slash
Siraya on the Slash is better than anything I’ve tried...and I’ve tried 5-6 other resins on the Slash. Example from left to right are 100um, 75um, and 50um. The one I’m holding is 50um.

100um 5 sec
75um 4 sec
50um 3.5 sec
25um 2.8 sec
10um 2.5 sec

- LED power 250 (default)
- First layer for all 12sec/ first 3 layers (default amount).
- Slow setting for Lift speed
- 8mm lift height is safest and allow time resin to flow back (they only allow you to pick from 3,8, and 15mm height...which sucks...I'd like 6mm if I could.
- Cooldown between layers on auto (smaller prints i do 2sec to speed things up)
- Supports point(head) size no less than 1mm, but 1.5 is recommended with 2mm shaft.
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Exposure For Blu Clear
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Recommended
Resin Temperture 25-35C
Room temperature 20-28C
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PrinterLayer HeightExposure (s)
# of Initial Layers
Exposure for Init LayersExposure (s)
# of Initial Layers
Exposure for Init Layers
Note
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Photon50um14 (s)465 s14 (s)690 s
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Photon-S50um11 (s)465 s11 (s)680 s
10mm lift distance help with support facing side surface
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EPA X150um10 (s)450 s10 (s)665 s
10mm lift distance help with support facing side surface
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EPA X1100um14 (s)475 s14 (s)690 s
10mm lift distance help with support facing side surface
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Elegoo Mars50um11 (s)450 s11 (s)660 s
10mm lift distance help with support facing side surface
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Shuffle50um10(s)575 s
10mm lift distance help with support facing side surface
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Shuffle XL50um14(s)575 s
10mm lift distance help with support facing side surface
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D750um10(s)575 s
10mm lift distance help with support facing side surface
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Inkspire50um13s450 s13 (s)690 s
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Moonray50um
use settigs for nextdent Ortho rigid
use settigs for nextdent Ortho rigid
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Slash
Siraya on the Slash is better than anything I’ve tried...and I’ve tried 5-6 other resins on the Slash. Example from left to right are 100um, 75um, and 50um. The one I’m holding is 50um.

100um 5.5 sec
75um 4.4 sec
50um 3.9 sec
25um 3 sec
10um 2.8 sec

- LED power 250 (default)
- First layer for all 14sec/ first 3 layers (default amount).
- Slow setting for Lift speed
- 8mm lift height is safest and allow time resin to flow back (they only allow you to pick from 3,8, and 15mm height...which sucks...I'd like 6mm if I could.
- Cooldown between layers on auto (smaller prints i do 2sec to speed things up)
- Supports point(head) size no less than 1mm, but 1.5 is recommended with 2mm shaft.
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Before Printing
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It is a good practice to mix resin and expose the bottom of the vat to air before printing. This replenish oxygen in the vat and helps reduce peel force.
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It would also ensure print consistency if user can get the initial resin temperature above 25 and keep the environmental temperature above 20 C
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Recommend best support settings:
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Make sure the support tip diameter is 1.2mm for larger prints with a depth of 0.5mm. See more full settings recommended
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https://www.facebook.com/groups/sirayatech/permalink/290257771885611/
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It is best to use island style base like below left, not the raft style on the right. If you have problem keeping first layer on, make sure you level again to minimize gap between build plate and LCD screen
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Cleaning:
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Use a painter brush (or any brush made with hair) remove excess resins on the printed part with Use 95% concentrated Ethanol (preferred) or IPA to clean. Some form of methnol should work but make sure it does not contain acetone.
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Do not submerge the parts in alcohol for more than 30 seconds. After 2-3 minutes of cleaning action, remove alcohol with a hair dryer or air blower. For complex part with lots cavities, it may be a good idea to clean/dry multiple times.
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User can check by touching the dryed surface of the part to see if it is still sticky. If the dryed surface is still sticky, wash some more and dry again.
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Post Curing:
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Blu reached its optimal strength when the printed part is post-cured with UV after cleaned. Use 395-405nm UV light and cure for about 15 minutes.
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Make sure resin is completely cleaned off and there is not alcohol left (it needs to be dry) on the print before curing.
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Curing by submerging object in water will significantly increase curing efficiency
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Mechanical Properties
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​Shore D 85
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Tensile Strength 44Mpa
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