Jackson impressed with a strike-filled, unbeaten 48 off 55 balls, which contained eight hits to the fence.
Old guard Karthik was batting on 35 off 65 balls, with the help of four boundaries as yet another day of cricket was curtailed by the elements at the Greater Noida Sports Complex Ground.
India Blue were placed at 285 for five in 78.2 overs when play was called off. This was due to the sixth-wicket unbeaten partnership of 85 runs between Sheldon and Karthik.
Earlier, Sheldon and Karthik, who were yet to open their account overnight, began the proceedings at 200 for five in a confident manner, scoring the boundaries as well as running the ones and twos, in the process steadying the ship that was somewhat wrecked by spinner Kuldeep Yadav's four-wicket burst yesterday evening.
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Jackson was harsh on Kuldeep as four of his eight boundaries came off the chinaman bowler. He hit a lot of shots in the arc between mid-on and mid-wicket. He also played a few cut shots off the pacers Ishwar Pandey and Nathu Singh.
After 34.2 overs on day one, 27.4 overs were possible on the second day.
Brief Scores: India Blue 285/5 in 78.2 overs (Gautam Gambhir 77, Mayank Agarwal 92, Sheldon Jackson 48 batting, Kuldeep Yadav 4/78) vs India Red.
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