SCI Engineered Materials, Inc. engages in the manufacture and supply of advanced materials for physical vapor deposition thin film applications. Its products include sputtering targets, evaporation materials, ceramic powders and substrates. The company was founded by Edward R. Funk and Ingeborg V. Funk in 1987 and is headquartered in Columbus, OH.
For the three months ended September 30, 2019, we had total revenue of $3,255,201. This was an increase of $602,566, or 22.7%, compared to the three months ended September 30, 2018. For the nine months ended September 30, 2019, we had total revenue of $10,012,187 compared to $7,043,244 for the same period in 2018. This was an increase of $2,968,943 or 42.2%, compared to the nine months ended September 30, 2018. Volume and pricing were higher in our photonics market and volume was lower in our thin film solar market during 2019.
Gross profit was $458,520 for the three months ended September 30, 2019 compared to $665,884 for the same three months in 2018. This was a decrease of $207,364, or 31.1%. Gross profit as a percentage of revenue (gross margin) was 14.1% for the third quarter of 2019 compared to 25.1% for the same period in 2018. Gross profit was $1,849,491 for the nine months ended September 30, 2019 compared to $1,917,425 for the first nine months of 2018. This was a decrease of $67,934 or 3.5%. Gross margin was 18.5% for the first nine months of 2019 compared to 27.2% for the same period in 2018. The decrease in gross profit was primarily due to product mix including lower volume in our thin film solar market previously mentioned. A certain raw material related to the increased volume in our photonics market had an increase in pricing which contributed to a lower gross margin which impacted overall gross margin.
General and administrative expense for the three months ended September 30, 2019 and 2018, was $247,984 and $310,464, respectively, a decrease of 20.1%. This decrease was primarily related to lower compensation of approximately $67,000, principally due to the retirement in June of 2019 of our former President and CEO.