Sony has announced limited edition versions of its Vaio Duo 13 and Vaio Pro notebook PCs with a red finish, according to Digital Spy.

The firm went through a rigorous process colouring the machines' aluminium surfaces with the correct pigment combination, according to Pocket-lint.

The Vaio Pro is a touchscreen-enabled ultrabook that runs the Windows 8 operating system and comes with a range of connectivity options, such as NFC technology.

Sony's Vaio Duo 13 is a slider hybrid entry to the range, providing both tablet and laptop functionality courtesy of its detachable screen.

Announced last week, both computers are powered by Intel's next-generation Haswell processors and feature 'full HD Triluminous display' technology for screen resolutions of 1,920 x 1,080.

The limited edition red models will be available from Sony stores and the firm's website later this month.