are known and have been used for decades in applications such as u201c carbonless copy paper u201d in particular blocked versions of leucomethylene blue are known and have been used in such applications and one such compound at least benzoyl leucomethylene blue blmb is commercially available however we have found that blmb does not deblock easily enough to yield an acceptable limited play dvd product other blocked leucomethylene blue compounds share this problem or deblock too easily such that oxidizable leucomethylene blue is generated in the coating fluid before it is desired we have found that triisopropylsilyloxycarbonylleucomethylene blue hereafter u201c tipsoclmb u201d whose structure and exemplary synthesis are illustrated in fig1 and described in example 4 has the following desirable properties for use in creating limited play dvds 1 it is readily synthesized in two steps from commercially available starting materials by isolating and purifying the boc lmb produced in the first step as shown in fig1 the tipsoclmb is prepared from a pure compound rather than from the typically very impure methylene blue 2 it can be incorporated into an acrylate formulation described in example 5 in which it is stable to conversion to oxidized methylene blue for at least several weeks at temperatures below 0 c allowing coating formulations to be prepared at one facility and shipped to another facility for dvd manufacturing if desired 3 it can be deblocked in a period of a week or less presumably.