Promotional activity utilising printable vouchers for presentation at points of sale are useful tools for any business looking to drive turnover for specific products or at specific times of day/week. However, when designing something that needs printing, please spare a thought for the volume of ink used.
Many vouchers look fantastic, full colour, funky graphics, but remember that the person printing out the voucher will be draining their ink reservoirs and may indeed be put off from your business objective (getting them to use the voucher and increase your turnover) due to this fact.
Check out these samples from recent offers I keep tabs on.
Keep vouchers lean, mean and clean. Design them to use as little ink as possible to achieve the functionality you require.
. . . or you could get in to digital vouchers . . .