Identification of Media and Indicator Liquid as A Recorder Smart Label
Abstract
In this research, identification of liquid as
color indicator and media i.e. paper as diffusion
media, has been studied. This study used several
types of paper as diffusion media (buffalo paper,
HVS 80 gr, photo paper, concord, drawing paper
and cardboard duplex). It also used high viscosity
liquid (cooking oil, oil A and oil B) as the indicator
liquid. The research was begun by paper and liquid
characterizations including gramature, density,
mass density and viscosity. Indicator liquid as
much as 20 mL was poured into chamber and the
edge of paper was immersed into the liquid. The
chambers were stored at 50°C for cooking oil,
while 30.1SoC and 5°C for other oil. Length of
liquid diffused in the ·paper was measured in em.
Measurement was done at at 24, 48, 72 and 96 h. A
graphic of paper length (L) vs time (t) was plotted
and diffuse rate constant (k) as well as activation
energy (Ea) was determined. Best media of
indicator liquid and paper was selected based on
their high value of Ea. Result showed that cooking
oil, oil A and oil B showed slow diffusion rate.
These materials were able to detect up to 4 days of
shelf life of such product during storage. Based on
activation energy, the most suitable indicator for
recorder smart label was oil A. The best materials
for this label development sequentially from low-to-
high activation energy were buffalo paper,
cardboard, drawing paper, concord, HVS 80 g and
photo paper.