An image forming apparatus includes a fixing liquid applicator to apply a fixing liquid to a recording medium before a toner image is transferred on the recording medium, a transfer device to transfer a toner image from a toner image bearing member onto the recording medium applied with the fixing liquid, and a fixing device to fixe the toner image on the recording medium by heating. The scanner includes an imaging camera including a high-resolution grayscale CCD sensor in combination with lower resolution red, green, and blue CCD sensors. More appropriately, these naturally occurring digital watermarks are referred to herein as fileprints. When exposed to the electric current the collars expand to engage the waists of the balloon thereby sealing the balloon.