POSTPROCESS SLA User manual

[e-mail]
Rev A
1.716.888.4579
Background
1. PostProcess SLA resin removal detergents PLM- 402- SUB (formerly PG1.2) and PLM- 403- SUB
(formerly PG1.3) are used in PostProcess SVC equipment to remove resin from 3D printed parts. The
specific gravity of both detergents new, without any resin in the solution, is 0.890 g / mL +/- 0.015.
As resin is removed from printed parts and dissolved into the detergent the specific gravity of the
detergent increases. PostProcess has found that the detergent becomes saturated with resin
removed from parts at 0.970 to 0.980 g / mL. This represents about 40% to 45% resin concentration
in the detergent.
2. A hydrometer is an instrument used to measure the density or specific gravity of a liquid as
compared to that of water. Hydrometers usually consist of a calibrated glass tube ending in a
weighted glass sphere that makes the tube stand upright when placed in a liquid. The lower the
density of the liquid, the deeper the tube sinks.
PostProcess P/N MIS0047 Hydrometer is to be used to measure the saturation of our SLA resin
removal solution.
3. Required Personal Protective Equipment (PPE):
a. Hand protection - appropriate protective gloves
b. Eye protection that complies with ANSI/ISEA Z87.1- 2015
c. Body protection - lab smock or lab coat
4. Other Recommended Equipment
a. Emergency Safety Shower and Emergency Eye Wash
b. Chemical Spill Kit
c. First Aid Kit
d. Cloth Wipes (Paper Towels)
INSTRUCTION FOR MEASURING
SATURATION IN SLA RESIN
REMOVAL SOLUTION

[e-mail]
Rev A
1.716.888.4579
Process
Checking Saturation of PPT Detergent
The goal is to check the saturation of the detergent and change out a saturated detergent before it becomes
oversaturated with resin that could result in damage to the equipment and/or parts.
1. Make sure detergent is well mixed before checking saturation level.
1.1. Prior to testing the detergent with the hydrometer, turn on the equipment and run for 5
minutes to ensure the detergent is well mixed.
2. Testing the SLA resin removal detergent.
2.1. Turn off the equipment.
2.2. Test saturation at 70°F (21.1°C) to 80°F (26.7°C).
2.3. Put the PostProcess Hydrometer P/N MIS0047 into the detergent.
2.4. The hydrometer will sink into a new or slightly saturated detergent, specific gravity
reading 0.890 g / mL to 0.910 g / mL.
2.5. The hydrometer will raise higher out of the liquid solution, specific gravity reading
0.920 g / mL to 0.960 g / mL.
FIGURE 01 - Hydrometer in the Detergent

[e-mail]
Rev A
1.716.888.4579
2.6. When a hydrometer reading of
0.970 to 0.980 g / mL is
observed the detergent is
saturated and it is time to
change the detergent.
2.7. After checking the detergent
saturation level remove the
Hydrometer from the tank /
detergent. Carefully wipe down
the hydrometer to remove
detergent and resin. The
Hydrometer should additionally
2.8.
2.9.
slightly with different types of resins.
2.10. If the hydrometer is broken and needs replacement, please contact PostProcess
Technologies to order a replacement. Order Part Number MIS0047 Hydrometer.
TABLE 01 - Reference Saturation Levels
Resin in Solution by Weight
+/- 2%
Specific Gravity
PLM- 402- SUB
and
PLM- 403- SUB
% Saturation
+/- 2%
0% Resin
0.890 g / mL
0%
10% Resin
0.905 g / mL
25%
20% Resin
0.924 g / mL
50%
30% Resin
0.943 g / mL
75%
40% Resin
0.962 g / mL
92%
42% Resin
0.980 g / mL
100%
FIGURE 02 - Reading the Hydrometer when Saturated
be cleaned with new detergent
or isopropyl alcohol (IPA) to maintain cleanliness of the hydrometer.
Do not run the equipment with the hydrometer in the tank.
Table 01 (below) provides reference saturation levels for PLM- 402- SUB and PLM-
403- SUB. The amount of resin in solution by weight and saturation levels may very

[e-mail]
Rev A
1.716.888.4579
DISCLAIMER
Please refer to the Safety Data Sheet (SDS) for complete information on Storage and Handling, Toxicological Properties, Personal Protection, First Aid,
Spill and Leak Procedures, and Waste Disposal. To order an SDS, please contact PostProcess Technologies. Before using or handling this product, the
SDS should be thoroughly reviewed.
POSTPROCESS TECHNOLOGIES MAKES NO WARRANTY TO THE USER OR RECIPIENT OF ANY PRODUCT FROM POSTPROCESS
TECHNOLOGIES, OR WITH RESPECT TO THE INFORMATION PROVIDED WITH THE PRODUCT, INCLUDING, BUT NOT LIMITED TO,
WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE, OR OF NONINFRINGEMENT OF THIRD PARTY RIGHTS
OR PATENTS, WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING OR PERFORMANCE, USAGE OF TRADE OR OTHERWISE.
PostProcess Technologies disclaims liability for any and all claims arising from the use, purchase or receipt of this product, including without limitation,
any and all incidental, consequential, indirect, special, or punitive damages arising out of or relating to the product or the information, EVEN IF ARISING
OUT OF OR RELATING TO A NEGLIGENT ACT, MISREPRESENTATION, OR OMISSION OF POSTPROCESS TECHNOLOGIES OR ITS
EMPLOYEES. The user is responsible for verifying that the product is suitable for user’s particular purposes under applicable laws and regulations and
assumes all risks and liabilities arising from its use, transport, purchase, sale or disposal of the product and information provided in the SDS. The
product may be covered by one or more United States or foreign patents or patent applications. PostProcess Technologies and the PostProcess
Technologies logo are trademarks of PostProcess Technologies. All other marks are the property of their respective owners. These Instructions will not
reduce PostProcess Technologies rights or expand PostProcess Technologies liabilities under any agreement between the user and PostProcess
Technologies or its affiliates.