In this research, a series of edible inks with gelatin as binders, water-soluble natural colorants (gardenia blue, cochineal carmine and gardenia yellow) as pigments, and glycerol as an additive, were prepared by a high-efficiency mechanical coupling process (mechanical multi-stage stirring and ball milling with high-pressure and low-time shear).Results showed when the contents of gardenia blue, cochineal carmine, and gardenia yellow were 0.75, 0.70, and 0.65 g/mL respectively, the color rendering and 3 interval thixotropy test (3ITT) thixotropic recovery of gelatin-based edible ink system were the best.When the concentration of gelatin aqueous solution was 1.0 g/L, the gelatin-based edible ink system had good stability and dispersion characteristics, exhibiting good freeze-thaw stability and low sedimentation rate.In addition, the incorporation of 0.1% (volume fraction) glycerol could improve the centrifugal stability and rheological properties (thixotropy index) of gelatin-based edible ink systems.Experiments showed the relatively stable edible ink system with excellent writing and painting effects could be prepared using gelatin as a binder, water-soluble natural pigment as a pigment, and glycerol as an additive, providing a reference for the research and development of edible ink and food application.
YANG Yuxin
,
CHENG Yang
,
ZHU Juncheng
,
QIAO Sihao
,
MA Liang
,
WANG Hongxia
,
ZHANG Yuhao
. Preparation of edible gelatin-based ink and its application in writing and painting[J]. Food and Fermentation Industries, 2024
, 50(13)
: 123
-128
.
DOI: 10.13995/j.cnki.11-1802/ts.036625
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