MICREX DEVELOPMENT CORP.

A mineral exploration and development company operating in Canada and the United States

TSX Venture Exchange symbol "MIX"

For immediate release

Update On Equipment Testing For Québec Magnetite In Newcastle, England

May 1, 2012 - Micrex Development Corp. announces that the 15 tons of raw magnetite shipped to a grinding equipment manufacturer in England has been successfully processed to produce heavy media at 320 mesh.

A state of the art plant has been designed to produce heavy media in a water-free process. The plant will not require a ball mill, with all the inherent noise that goes with it. The grinding technology will produce product at less cost, and with significantly less environmental impact than traditional methods.

The magnetite processing plant will be built at St. Charles, Québec in two stages.

Stage one will produce 66,000 tons per year, and will cost $2,300,000.

The equipment manufacturer is prepared to finance the plant on a lease purchase plan. The nearest competitor producing similar magnetite products is in Norway, so it is expected that North American sales will justify the expansion to stage two within eight months of completion of the first stage, at an additional cost of $2,000,000.

The products the plant will produce will be heavy media for the water purification industry, and for upgrading in the coal industry. There are also other markets and industrial applications for the products, such as heavy concrete that is used in various kinds of construction.

Micrex Development Corp. (TSX.V: MIX) is a mineral exploration company based in Alberta, Canada with mining properties in North America.

Further information may be obtained from Perry Meszaros or S.E. Marshall at (780) 448-0922
or email at mixinfo-1@mixcorp.com

Web site address: www.mixcorp.com

MICREX DEVELOPMENT CORP.

Burmis Magnetite/Titanium Property - St. Charles de Bourget Magnetite/Titanium/Apatite Property - Fort Steel Placer Property - Bighorn Gold Mine - Mount Royal Gold Mine - Deadwood Gold Mine - Sunburst Gold Property

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICE PROVIDER (AS THAT TERM IS DEFINED IN THE POLICIES OF THE TSX VENTURE EXCHANGE) ACCEPTS RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.

FORWARD LOOKING STATEMENTS

Certain statements in this news release are "forward-looking statements", which reflect management's expectations regarding its property and business operations. All statements other than statements of historical fact contained in this news release are forward-looking statements. Such forward-looking statements involve risks and uncertainties, as they reflect management's current beliefs and are based on information currently available to management. Actual results may differ materially from those anticipated in the statements made. The forward-looking statements are expressly qualified in their entirety by this cautionary statement. The forward-looking statements are made as of the date of this news release and Micrex assumes no obligation to update or revise them to reflect new events or circumstances except as expressly required by applicable securities law. Further information regarding the uncertainties and risks can be found in the disclosure documents filed by Micrex with the securities regulatory authorities, available at www.sedar.com