| 摘要 |
<p>The invention relates to inks, particularly marker inks and is especially concerned with the problem known to be associated with conventional inks, the drying out of ink in the tip or point of a marker pen or the nib of a pen. This problem has been the subject of considerable research with various proposals for the incorporation of an anti-drying agent. The object of the present invention is to provide an improved ink that provides a substantial retardation of the drying out of the ink over many days and at the same time leave the pen in a condition for the immediate commencement of marking or writing. This objective is met by an ink that includes a dispersion of a wax or wax-like material. The invention also involves a process for preparing an ink employing an organic solvent, and comprises preparing an ink product by heating to a temperature in excess of the melting point of a selected wax or wax-like material and at which temperature the wax or wax-like material will be soluble, adding said wax or wax-like material to said ink product and dissolving the wax to obtain a homogenous solution, allowing the combination of wax and ink to cool such that the wax becomes essentially insoluble and creates a fine dispersion of wax in the ink.</p> |
