"almost saturated" is a correct and usable phrase in written English.
You can use it to describe something that is almost full, or nearly saturated with a particular something. For example, "The market was almost saturated with new competitors."
This indicated that the adsorption zone was almost saturated at the time of exhaustion.
Cellular uptake of Fc-conjugated NPs with a fluorescence concentration of 8 ngmL−1 was almost saturated during the period.
The interstitial liquid stream entering the lumen becomes almost saturated with drug as it flows out of the HFHP.
The relative lifetime increases with MgO thin film thickness, but it is almost saturated with thickness over 5000 Å.
When I made a print, the couch seemed almost saturated with red; it also appeared to cast a shadow along the wall it was pushed up against.
We have found that the grain size reduction of the Nb is almost saturated at ∼300 nm after eight passes of ECAE.
The aquifer in Thun is almost saturated with dissolved oxygen and the groundwater flow velocities are ca. 10 15 m/day.
Around the end of the discharge the transformer core is almost saturated and the nonsaturated yokes are important for the flux function distribution.
I've always particularly loved one, a three-by-four-foot canvas almost saturated in thick blood-red paint, with just a window of white canvas shining through in the upper right corner.
With the mobile phone market almost saturated and the recession pushing customers to hang on longer to their phones, handset shipments fell last year for the first time since 1996.
Tests on the water showed that it was almost saturated with gas: Sigurdsson and his colleagues concluded that the deaths were a result of a limnic eruption, also known as lake overturn or lake explosion.
