US 12,240,169 B2
Three-dimensional printing with detector solutions
Emre Hiro Discekici, San Diego, CA (US); Graciela Emma Negri Jimenez, San Diego, CA (US); Shannon Reuben Woodruff, San Diego, CA (US); Alay Yemane, San Diego, CA (US); and Jacob Wright, San Diego, CA (US)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 17/777,802
Filed by HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P., Spring, TX (US)
PCT Filed Dec. 13, 2019, PCT No. PCT/US2019/066159
§ 371(c)(1), (2) Date May 18, 2022,
PCT Pub. No. WO2021/118584, PCT Pub. Date Jun. 17, 2021.
Prior Publication US 2022/0411655 A1, Dec. 29, 2022
Int. Cl. B29C 64/165 (2017.01); B29C 64/188 (2017.01); B29C 64/30 (2017.01); B29C 64/357 (2017.01); B33Y 10/00 (2015.01); B33Y 40/00 (2020.01); B33Y 70/00 (2020.01); B33Y 99/00 (2015.01); C09D 11/322 (2014.01); C09D 11/38 (2014.01); C09D 11/40 (2014.01); C09D 11/50 (2014.01); G01N 21/78 (2006.01); G01N 21/91 (2006.01); G01N 21/94 (2006.01); B29K 77/00 (2006.01); B29K 105/00 (2006.01)
CPC B29C 64/165 (2017.08) [B29C 64/188 (2017.08); B29C 64/30 (2017.08); B29C 64/357 (2017.08); B33Y 10/00 (2014.12); B33Y 40/00 (2014.12); B33Y 70/00 (2014.12); B33Y 99/00 (2014.12); C09D 11/322 (2013.01); C09D 11/38 (2013.01); C09D 11/40 (2013.01); C09D 11/50 (2013.01); G01N 21/78 (2013.01); G01N 21/91 (2013.01); G01N 21/94 (2013.01); B29K 2077/00 (2013.01); B29K 2105/0032 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of testing powder bed material for contamination, the method comprising:
printing a three-dimensional printed object using a process that includes applying a fusing agent to a powder bed material to form the three-dimensional object from a portion of the powder bed material while leaving a leftover portion of the powder bed material, wherein the powder bed material comprises polymer particles and wherein the fusing agent comprises a first pigment reactant; and
determining whether the leftover portion of the powder bed material is contaminated with the fusing agent by contacting a sample of the leftover portion of the powder bed material with a detector solution comprising water and a second pigment reactant, wherein the second pigment reactant is reactive with the first pigment reactant to form a colored pigment indicating contamination of the sample with the fusing agent.