Unfortunately upbeat announcements don't always solve the problem.
Cautionary tales from the graphite space;
1/03/2016
https://www.asx.com.au/asxpdf/20160301/pdf/435hqpy8tlj9g9.pdf
03/03/2017
https://www.asx.com.au/asxpdf/20160303/pdf/435kkfjjlss46h.pdf
and also;
30/06/2015
https://www.smh.com.au/technology/a...agical-material-graphene-20150629-gi0e4w.html
15/07/2016
https://www.asx.com.au/asxpdf/20160718/pdf/438mckq1zqqls5.pdf