Testing of I-Minerals' HalloPure Halloysite Yields Excellent Results - Seite 2

In a second test, Hydroxyquinoline ("HQ" an important antioxidant and anticorrosion inhibitor) was loaded into I-Minerals' HalloPure HNTs and the other US producer's HNTs simultaneously under the same conditions. A release study in water was also performed simultaneously and the release was measured (240 nm) using a UV-Vis spectrophotometer. Initial burst release was lower in the case of I-Minerals' HalloPure HNTs (33 wt %) when compared to the other US producer's HNTs (43%). The overall release profile was similar, but release from I-Minerals' HNTs was slower. HQ release extended up to 3 hours in both cases.

Zeta potential is a key indicator of the stability of colloidal suspensions. When the like ionic charge surrounding the tubes is high such that the particles strongly repel, there is a low tendency to recombine, form aggregates and settle out. Untreated HNTs from I-Minerals were measured at -44±2 mV and when treated with Polystyrene sulfonate (PSS) the zeta potential was modified to -55 mV. Zeta potentials from 40 to 60 mV indicate good stability of colloidal dispersions and above 61 mV are considered excellent. These results indicate I-Minerals HalloPure halloysite is well suited for all sorts of cosmetic, pharmaceutical, agriculture, polymers and paint products.

"These test results support our belief that we have one of the best halloysite products that can be readily produced in commercial quantities and supports much of the research we have undertaken in Germany and elsewhere," states Thomas Conway, President and CEO of I-Minerals Inc. "We knew we had one of the highest aspect ratio halloysites available that contained no cristobalite and limited other deleterious heavy metals and now these results demonstrate our Ultra HalloPure is probably the best halloysite available."

A. Lamar Long, CPG, is a qualified person ("QP") for I-Minerals Inc. and has reviewed and approved the contents of this release.

About I-Minerals Inc.

I-Minerals is developing multiple deposits of high purity, high value halloysite, quartz, potassium feldspar and kaolin at its strategically located Helmer-Bovill property in north central Idaho. A 2014 Prefeasibility Study on the Bovill Kaolin Deposit completed by SRK Consulting (USA) Inc. highlights the potential of the Helmer-Bovill property's Bovill Kaolin deposit: after tax NPV₆ of $212 million; 30.5% IRR; 3 year payback and $72.7 million initial CAPEX; $84 million CAPEX including life of mine sustaining capital over a 25 year mine life. Ongoing development work is focused on moving project towards production.