. >> reporter: arisa ortiz is a dermatologist with u.c. san and minerals, but they're usually just industrial grade. so they're not really regulated to make sure that they're safe for injection into the skin. >> reporter: celebrity tattoo artist keith mccurdy says he trusts his ink suppliers but thinks there's a need for better regulation over the industry. >> anyone can just essentially buy equipment and call themselves a tattoo artist and people. so i think that's dangerous. and i think that that should change. >> reporter: the f.d.a. admits scrutiny of the tattoo industry has not been a priority for the agency. but, scott, researchers there have recently come up with new ways to look for toxins, and they're trying to develop new methods to identify just what is in those color pig ams. >> pelley: anna werner, thanks. there's nothing hazardous about the paint on astronaut kate rubins' flight suit, though is might overwhelm the eyes. she spoke from the international space station with children who are battling cancer. the kid appellanted i

san diego dermatologist arisa ortiz studied the issue. >> what's concerning about tattoo inks is we really's going into these tattoo inks. >> reporter: in fact, the fda notes many pigments in inks are industrial-grade colors used for printer's ink or automobile paint. ortiz says some contain heavy metals like cobalt or cadmium. >> and it can cause many different types of problems like just allergic skin rashes or inflammatory reactions or even types of skin cancer. when you go in to get a tattoo it's important you're aware of that and don't think it's just harmless paint going into your skin. >> reporter: the fda reports seven voluntary recalls of tattoo ink since 2004, one that came after 19 people contracted a serious infection from contaminated ink. this owner says he trusts his ink suppliers but agrees, inks nationwide deserve more scrutiny. >> i think that in the future they do need to really test what's inside of them. captioning funded by cbs >>> it's friday, september 23rd, 2016. this is the ""cbs morning news."" >> with the national guard looking on, a third night of protests in c

san diego dermatologist, arisa ortiz study the issue. >> what is concerning about tattoo inks, is that we do not know what is going into these tattoo inks. >>reporter:the fda notes many pigments and inks are industrial gray colors used for printers ink or automobile paint. ortiz says some contain heavy metals, like cobalt or cadmium. >> it can cause many types of different problems. allergic skin inflammatory reactions, or even types of skin cancer, when you go in to get a tattoo, it is important that you are aware of that to do not think it is just harmless pain going into your skin. >>reporter:the fda report seven voluntary recalls of tattoo ink since 2004. one that came after 19 people contracted a serious infection from contaminated ink. this owner says he trusts his scrutiny. >> i think, in the future, they do need to really test what is inside of them. >>reporter:the fda is in the process of doing just that. the agency recently came up with new ways to look for harmful toxins, and those inks, and is trying to develop methods to identify just what is in those color pigments. they

san diego dermatologist arisa ortiz studied the issue. >> what's concerning about tattoo inks is we really don't >> reporter: in fact, the fda notes many pigments in inks are industrial-grade colors used for printer's ink or automobile paint. ortiz says some contain heavy metals like cobalt or cadmium. >> and it can cause many different types of problems like just allergic skin rashes or inflammatory reactions or even types of skin cancer. when you go in to get a tattoo it's important you're aware of that and don't think it's just harmless paint going into your skin. >> reporter: the fda reports seven voluntary recalls of tattoo ink since 2004, one that came after 19 people contracted a serious infection from contaminated ink. this owner says he trusts his ink suppliers but agrees, inks nationwide deserve more scrutiny. >> i think that in the future they do need to really test >>> now it's a criminal case. the tulsa police officer who fatally shot a black motorist is charged with manslaughter. >> a warrant has been issued for her arrest. >>> also tonight, the national guard moves in to cha