Acid Test Paper, Wine Range

Measuring in the range of 2.8-4.4 pH for wine, vial of 100 papers.  Dip test paper into sample for 1 or 2 seconds and match color on test strip to color chart to determine pH of sample.  Compare test strip to chart within 1 min. while strip is still wet.  Readings can be subjective especially with red wines.  Since readings are based on a visual comparison, accuracy is only approximately 0.10 pH for white wines and 0.20 pH for red wines.